Home / 39,779.66-54,897.28-21,875.42

Finding the Fourth Proportional to 39,779.66, 54,897.28 and 21,875.42

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Solution

The fourth proportional to 39,779.66, 54,897.28 and 21,875.42 is: 30,188.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.66 : 54,897.28 = 21,875.42 : x
  2. Step 2: Convert to fraction form
    39,779.66/54,897.28 = 21,875.42/x
  3. Step 3: Cross multiply
    39,779.66x = 54,897.28 × 21,875.42
  4. Step 4: Simplify right side
    39,779.66x = 1,200,901,056.86
  5. Step 5: Solve for x
    x = 1,200,901,056.86/39,779.66
  6. Step 6: Final answer
    x = 30,188.82

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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.