Home / 28,129,901.48-42,140,255.56-20,730,510.80

Finding the Fourth Proportional to 28,129,901.48, 42,140,255.56 and 20,730,510.80

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Solution

The fourth proportional to 28,129,901.48, 42,140,255.56 and 20,730,510.80 is: 31,055,530.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,129,901.48 : 42,140,255.56 = 20,730,510.80 : x
  2. Step 2: Convert to fraction form
    28,129,901.48/42,140,255.56 = 20,730,510.80/x
  3. Step 3: Cross multiply
    28,129,901.48x = 42,140,255.56 × 20,730,510.80
  4. Step 4: Simplify right side
    28,129,901.48x = 873,589,023,001,340.12
  5. Step 5: Solve for x
    x = 873,589,023,001,340.12/28,129,901.48
  6. Step 6: Final answer
    x = 31,055,530.84

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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.