Home / 21,318.85-29,417.56-12,363.09

Finding the Fourth Proportional to 21,318.85, 29,417.56 and 12,363.09

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Solution

The fourth proportional to 21,318.85, 29,417.56 and 12,363.09 is: 17,059.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.85 : 29,417.56 = 12,363.09 : x
  2. Step 2: Convert to fraction form
    21,318.85/29,417.56 = 12,363.09/x
  3. Step 3: Cross multiply
    21,318.85x = 29,417.56 × 12,363.09
  4. Step 4: Simplify right side
    21,318.85x = 363,691,941.86
  5. Step 5: Solve for x
    x = 363,691,941.86/21,318.85
  6. Step 6: Final answer
    x = 17,059.64

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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.