Home / 21,126.90-29,155.81-12,173.70

Finding the Fourth Proportional to 21,126.90, 29,155.81 and 12,173.70

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Solution

The fourth proportional to 21,126.90, 29,155.81 and 12,173.70 is: 16,800.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.90 : 29,155.81 = 12,173.70 : x
  2. Step 2: Convert to fraction form
    21,126.90/29,155.81 = 12,173.70/x
  3. Step 3: Cross multiply
    21,126.90x = 29,155.81 × 12,173.70
  4. Step 4: Simplify right side
    21,126.90x = 354,934,084.20
  5. Step 5: Solve for x
    x = 354,934,084.20/21,126.90
  6. Step 6: Final answer
    x = 16,800.10

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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.