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Finding the Fourth Proportional to 15,157.98, 20,926.69 and 10,130.72

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Solution

The fourth proportional to 15,157.98, 20,926.69 and 10,130.72 is: 13,986.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,157.98 : 20,926.69 = 10,130.72 : x
  2. Step 2: Convert to fraction form
    15,157.98/20,926.69 = 10,130.72/x
  3. Step 3: Cross multiply
    15,157.98x = 20,926.69 × 10,130.72
  4. Step 4: Simplify right side
    15,157.98x = 212,002,306.96
  5. Step 5: Solve for x
    x = 212,002,306.96/15,157.98
  6. Step 6: Final answer
    x = 13,986.18

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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.