Home / 31,129,409.60-42,970,049.10-18,740,079.20

Finding the Fourth Proportional to 31,129,409.60, 42,970,049.10 and 18,740,079.20

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Solution

The fourth proportional to 31,129,409.60, 42,970,049.10 and 18,740,079.20 is: 25,868,210.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,129,409.60 : 42,970,049.10 = 18,740,079.20 : x
  2. Step 2: Convert to fraction form
    31,129,409.60/42,970,049.10 = 18,740,079.20/x
  3. Step 3: Cross multiply
    31,129,409.60x = 42,970,049.10 × 18,740,079.20
  4. Step 4: Simplify right side
    31,129,409.60x = 805,262,123,361,888.75
  5. Step 5: Solve for x
    x = 805,262,123,361,888.75/31,129,409.60
  6. Step 6: Final answer
    x = 25,868,210.60

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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.