Home / 20,641.95-28,497.71-13,588.88

Finding the Fourth Proportional to 20,641.95, 28,497.71 and 13,588.88

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Solution

The fourth proportional to 20,641.95, 28,497.71 and 13,588.88 is: 18,760.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.95 : 28,497.71 = 13,588.88 : x
  2. Step 2: Convert to fraction form
    20,641.95/28,497.71 = 13,588.88/x
  3. Step 3: Cross multiply
    20,641.95x = 28,497.71 × 13,588.88
  4. Step 4: Simplify right side
    20,641.95x = 387,251,852.95
  5. Step 5: Solve for x
    x = 387,251,852.95/20,641.95
  6. Step 6: Final answer
    x = 18,760.43

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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.