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Finding the Fourth Proportional to 20,156.90, 30,235.35 and 14,972.90

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Solution

The fourth proportional to 20,156.90, 30,235.35 and 14,972.90 is: 22,459.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.90 : 30,235.35 = 14,972.90 : x
  2. Step 2: Convert to fraction form
    20,156.90/30,235.35 = 14,972.90/x
  3. Step 3: Cross multiply
    20,156.90x = 30,235.35 × 14,972.90
  4. Step 4: Simplify right side
    20,156.90x = 452,710,872.02
  5. Step 5: Solve for x
    x = 452,710,872.02/20,156.90
  6. Step 6: Final answer
    x = 22,459.35

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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.