Home / 48,405.12-72,638.88-20,703.36

Finding the Fourth Proportional to 48,405.12, 72,638.88 and 20,703.36

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Solution

The fourth proportional to 48,405.12, 72,638.88 and 20,703.36 is: 31,068.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,405.12 : 72,638.88 = 20,703.36 : x
  2. Step 2: Convert to fraction form
    48,405.12/72,638.88 = 20,703.36/x
  3. Step 3: Cross multiply
    48,405.12x = 72,638.88 × 20,703.36
  4. Step 4: Simplify right side
    48,405.12x = 1,503,868,882.64
  5. Step 5: Solve for x
    x = 1,503,868,882.64/48,405.12
  6. Step 6: Final answer
    x = 31,068.38

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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.