Home / 13,685.28-20,531.16-9,818.88

Finding the Fourth Proportional to 13,685.28, 20,531.16 and 9,818.88

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Solution

The fourth proportional to 13,685.28, 20,531.16 and 9,818.88 is: 14,730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,685.28 : 20,531.16 = 9,818.88 : x
  2. Step 2: Convert to fraction form
    13,685.28/20,531.16 = 9,818.88/x
  3. Step 3: Cross multiply
    13,685.28x = 20,531.16 × 9,818.88
  4. Step 4: Simplify right side
    13,685.28x = 201,592,996.30
  5. Step 5: Solve for x
    x = 201,592,996.30/13,685.28
  6. Step 6: Final answer
    x = 14,730.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.