Home / 21,518.38-29,690.10-12,560.74

Finding the Fourth Proportional to 21,518.38, 29,690.10 and 12,560.74

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Solution

The fourth proportional to 21,518.38, 29,690.10 and 12,560.74 is: 17,330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.38 : 29,690.10 = 12,560.74 : x
  2. Step 2: Convert to fraction form
    21,518.38/29,690.10 = 12,560.74/x
  3. Step 3: Cross multiply
    21,518.38x = 29,690.10 × 12,560.74
  4. Step 4: Simplify right side
    21,518.38x = 372,929,626.67
  5. Step 5: Solve for x
    x = 372,929,626.67/21,518.38
  6. Step 6: Final answer
    x = 17,330.75

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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.