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Finding the Fourth Proportional to 15,581.10, 21,502.02 and 8,507.68

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Solution

The fourth proportional to 15,581.10, 21,502.02 and 8,507.68 is: 11,740.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,581.10 : 21,502.02 = 8,507.68 : x
  2. Step 2: Convert to fraction form
    15,581.10/21,502.02 = 8,507.68/x
  3. Step 3: Cross multiply
    15,581.10x = 21,502.02 × 8,507.68
  4. Step 4: Simplify right side
    15,581.10x = 182,932,305.51
  5. Step 5: Solve for x
    x = 182,932,305.51/15,581.10
  6. Step 6: Final answer
    x = 11,740.65

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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.