Home / 15,301.59-21,116.57-8,587.74

Finding the Fourth Proportional to 15,301.59, 21,116.57 and 8,587.74

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Solution

The fourth proportional to 15,301.59, 21,116.57 and 8,587.74 is: 11,851.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301.59 : 21,116.57 = 8,587.74 : x
  2. Step 2: Convert to fraction form
    15,301.59/21,116.57 = 8,587.74/x
  3. Step 3: Cross multiply
    15,301.59x = 21,116.57 × 8,587.74
  4. Step 4: Simplify right side
    15,301.59x = 181,343,649.10
  5. Step 5: Solve for x
    x = 181,343,649.10/15,301.59
  6. Step 6: Final answer
    x = 11,851.30

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Half scale
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Double scale
Find fourth proportional to 15,302.59, 21,117.95 and 8,588.74
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.