Home / 21,877.60-32,854.80-21,186.40

Finding the Fourth Proportional to 21,877.60, 32,854.80 and 21,186.40

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Solution

The fourth proportional to 21,877.60, 32,854.80 and 21,186.40 is: 31,816.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,877.60 : 32,854.80 = 21,186.40 : x
  2. Step 2: Convert to fraction form
    21,877.60/32,854.80 = 21,186.40/x
  3. Step 3: Cross multiply
    21,877.60x = 32,854.80 × 21,186.40
  4. Step 4: Simplify right side
    21,877.60x = 696,074,934.72
  5. Step 5: Solve for x
    x = 696,074,934.72/21,877.60
  6. Step 6: Final answer
    x = 31,816.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.