Home / 21,347.64-29,470.14-14,987.70

Finding the Fourth Proportional to 21,347.64, 29,470.14 and 14,987.70

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Solution

The fourth proportional to 21,347.64, 29,470.14 and 14,987.70 is: 20,690.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,347.64 : 29,470.14 = 14,987.70 : x
  2. Step 2: Convert to fraction form
    21,347.64/29,470.14 = 14,987.70/x
  3. Step 3: Cross multiply
    21,347.64x = 29,470.14 × 14,987.70
  4. Step 4: Simplify right side
    21,347.64x = 441,689,617.28
  5. Step 5: Solve for x
    x = 441,689,617.28/21,347.64
  6. Step 6: Final answer
    x = 20,690.33

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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.