Home / 21,290.52-29,381.40-11,859.72

Finding the Fourth Proportional to 21,290.52, 29,381.40 and 11,859.72

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Solution

The fourth proportional to 21,290.52, 29,381.40 and 11,859.72 is: 16,366.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.52 : 29,381.40 = 11,859.72 : x
  2. Step 2: Convert to fraction form
    21,290.52/29,381.40 = 11,859.72/x
  3. Step 3: Cross multiply
    21,290.52x = 29,381.40 × 11,859.72
  4. Step 4: Simplify right side
    21,290.52x = 348,455,177.21
  5. Step 5: Solve for x
    x = 348,455,177.21/21,290.52
  6. Step 6: Final answer
    x = 16,366.68

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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.