Home / 21,278.16-29,240.52-20,302.47

Finding the Fourth Proportional to 21,278.16, 29,240.52 and 20,302.47

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Solution

The fourth proportional to 21,278.16, 29,240.52 and 20,302.47 is: 27,899.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.16 : 29,240.52 = 20,302.47 : x
  2. Step 2: Convert to fraction form
    21,278.16/29,240.52 = 20,302.47/x
  3. Step 3: Cross multiply
    21,278.16x = 29,240.52 × 20,302.47
  4. Step 4: Simplify right side
    21,278.16x = 593,654,780.08
  5. Step 5: Solve for x
    x = 593,654,780.08/21,278.16
  6. Step 6: Final answer
    x = 27,899.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.