Home / 20,915,865.60-31,373,798.40-12,731,674.20

Finding the Fourth Proportional to 20,915,865.60, 31,373,798.40 and 12,731,674.20

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Solution

The fourth proportional to 20,915,865.60, 31,373,798.40 and 12,731,674.20 is: 19,097,511.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,865.60 : 31,373,798.40 = 12,731,674.20 : x
  2. Step 2: Convert to fraction form
    20,915,865.60/31,373,798.40 = 12,731,674.20/x
  3. Step 3: Cross multiply
    20,915,865.60x = 31,373,798.40 × 12,731,674.20
  4. Step 4: Simplify right side
    20,915,865.60x = 399,440,979,645,281.25
  5. Step 5: Solve for x
    x = 399,440,979,645,281.25/20,915,865.60
  6. Step 6: Final answer
    x = 19,097,511.30

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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.