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Finding the Fourth Proportional to 15,011.52, 20,702.40 and 9,700.74

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Solution

The fourth proportional to 15,011.52, 20,702.40 and 9,700.74 is: 13,378.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,011.52 : 20,702.40 = 9,700.74 : x
  2. Step 2: Convert to fraction form
    15,011.52/20,702.40 = 9,700.74/x
  3. Step 3: Cross multiply
    15,011.52x = 20,702.40 × 9,700.74
  4. Step 4: Simplify right side
    15,011.52x = 200,828,599.78
  5. Step 5: Solve for x
    x = 200,828,599.78/15,011.52
  6. Step 6: Final answer
    x = 13,378.30

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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.