Home / 15,502.13-21,393.08-8,428.58

Finding the Fourth Proportional to 15,502.13, 21,393.08 and 8,428.58

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Solution

The fourth proportional to 15,502.13, 21,393.08 and 8,428.58 is: 11,631.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,502.13 : 21,393.08 = 8,428.58 : x
  2. Step 2: Convert to fraction form
    15,502.13/21,393.08 = 8,428.58/x
  3. Step 3: Cross multiply
    15,502.13x = 21,393.08 × 8,428.58
  4. Step 4: Simplify right side
    15,502.13x = 180,313,137.12
  5. Step 5: Solve for x
    x = 180,313,137.12/15,502.13
  6. Step 6: Final answer
    x = 11,631.51

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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.