Home / 21,330.18-29,434.95-11,639.25

Finding the Fourth Proportional to 21,330.18, 29,434.95 and 11,639.25

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Solution

The fourth proportional to 21,330.18, 29,434.95 and 11,639.25 is: 16,061.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,330.18 : 29,434.95 = 11,639.25 : x
  2. Step 2: Convert to fraction form
    21,330.18/29,434.95 = 11,639.25/x
  3. Step 3: Cross multiply
    21,330.18x = 29,434.95 × 11,639.25
  4. Step 4: Simplify right side
    21,330.18x = 342,600,741.79
  5. Step 5: Solve for x
    x = 342,600,741.79/21,330.18
  6. Step 6: Final answer
    x = 16,061.78

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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.