Home / 20,531.11-28,330.98-11,580.01

Finding the Fourth Proportional to 20,531.11, 28,330.98 and 11,580.01

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Solution

The fourth proportional to 20,531.11, 28,330.98 and 11,580.01 is: 15,979.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.11 : 28,330.98 = 11,580.01 : x
  2. Step 2: Convert to fraction form
    20,531.11/28,330.98 = 11,580.01/x
  3. Step 3: Cross multiply
    20,531.11x = 28,330.98 × 11,580.01
  4. Step 4: Simplify right side
    20,531.11x = 328,073,031.71
  5. Step 5: Solve for x
    x = 328,073,031.71/20,531.11
  6. Step 6: Final answer
    x = 15,979.31

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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.