Home / 15,529.83-21,430.51-8,456.23

Finding the Fourth Proportional to 15,529.83, 21,430.51 and 8,456.23

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Solution

The fourth proportional to 15,529.83, 21,430.51 and 8,456.23 is: 11,669.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,529.83 : 21,430.51 = 8,456.23 : x
  2. Step 2: Convert to fraction form
    15,529.83/21,430.51 = 8,456.23/x
  3. Step 3: Cross multiply
    15,529.83x = 21,430.51 × 8,456.23
  4. Step 4: Simplify right side
    15,529.83x = 181,221,321.58
  5. Step 5: Solve for x
    x = 181,221,321.58/15,529.83
  6. Step 6: Final answer
    x = 11,669.24

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Half scale
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Double scale
Find fourth proportional to 15,530.83, 21,431.89 and 8,457.23
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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.