Home / 21,129,621.60-31,694,432.40-20,846,186.40

Finding the Fourth Proportional to 21,129,621.60, 31,694,432.40 and 20,846,186.40

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Solution

The fourth proportional to 21,129,621.60, 31,694,432.40 and 20,846,186.40 is: 31,269,279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129,621.60 : 31,694,432.40 = 20,846,186.40 : x
  2. Step 2: Convert to fraction form
    21,129,621.60/31,694,432.40 = 20,846,186.40/x
  3. Step 3: Cross multiply
    21,129,621.60x = 31,694,432.40 × 20,846,186.40
  4. Step 4: Simplify right side
    21,129,621.60x = 660,708,045,652,599.25
  5. Step 5: Solve for x
    x = 660,708,045,652,599.25/21,129,621.60
  6. Step 6: Final answer
    x = 31,269,279.60

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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.