Home / 20,647.17-28,490.55-12,577.89

Finding the Fourth Proportional to 20,647.17, 28,490.55 and 12,577.89

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Solution

The fourth proportional to 20,647.17, 28,490.55 and 12,577.89 is: 17,355.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.17 : 28,490.55 = 12,577.89 : x
  2. Step 2: Convert to fraction form
    20,647.17/28,490.55 = 12,577.89/x
  3. Step 3: Cross multiply
    20,647.17x = 28,490.55 × 12,577.89
  4. Step 4: Simplify right side
    20,647.17x = 358,351,033.78
  5. Step 5: Solve for x
    x = 358,351,033.78/20,647.17
  6. Step 6: Final answer
    x = 17,355.94

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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.