Home / 18,771,457.20-28,159,810.20-7,988,672.40

Finding the Fourth Proportional to 18,771,457.20, 28,159,810.20 and 7,988,672.40

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Solution

The fourth proportional to 18,771,457.20, 28,159,810.20 and 7,988,672.40 is: 11,984,125.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771,457.20 : 28,159,810.20 = 7,988,672.40 : x
  2. Step 2: Convert to fraction form
    18,771,457.20/28,159,810.20 = 7,988,672.40/x
  3. Step 3: Cross multiply
    18,771,457.20x = 28,159,810.20 × 7,988,672.40
  4. Step 4: Simplify right side
    18,771,457.20x = 224,959,498,533,978.50
  5. Step 5: Solve for x
    x = 224,959,498,533,978.50/18,771,457.20
  6. Step 6: Final answer
    x = 11,984,125.48

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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.