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Finding the Fourth Proportional to 15,031.71, 20,743.96 and 9,368.75

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Solution

The fourth proportional to 15,031.71, 20,743.96 and 9,368.75 is: 12,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031.71 : 20,743.96 = 9,368.75 : x
  2. Step 2: Convert to fraction form
    15,031.71/20,743.96 = 9,368.75/x
  3. Step 3: Cross multiply
    15,031.71x = 20,743.96 × 9,368.75
  4. Step 4: Simplify right side
    15,031.71x = 194,344,975.25
  5. Step 5: Solve for x
    x = 194,344,975.25/15,031.71
  6. Step 6: Final answer
    x = 12,929.00

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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.