Home / 21,089.94-29,103.28-12,140.32

Finding the Fourth Proportional to 21,089.94, 29,103.28 and 12,140.32

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Solution

The fourth proportional to 21,089.94, 29,103.28 and 12,140.32 is: 16,753.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,089.94 : 29,103.28 = 12,140.32 : x
  2. Step 2: Convert to fraction form
    21,089.94/29,103.28 = 12,140.32/x
  3. Step 3: Cross multiply
    21,089.94x = 29,103.28 × 12,140.32
  4. Step 4: Simplify right side
    21,089.94x = 353,323,132.25
  5. Step 5: Solve for x
    x = 353,323,132.25/21,089.94
  6. Step 6: Final answer
    x = 16,753.16

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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.