Home / 15,495.56-21,383.51-8,689.13

Finding the Fourth Proportional to 15,495.56, 21,383.51 and 8,689.13

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Solution

The fourth proportional to 15,495.56, 21,383.51 and 8,689.13 is: 11,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.56 : 21,383.51 = 8,689.13 : x
  2. Step 2: Convert to fraction form
    15,495.56/21,383.51 = 8,689.13/x
  3. Step 3: Cross multiply
    15,495.56x = 21,383.51 × 8,689.13
  4. Step 4: Simplify right side
    15,495.56x = 185,804,098.25
  5. Step 5: Solve for x
    x = 185,804,098.25/15,495.56
  6. Step 6: Final answer
    x = 11,990.80

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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.