Home / 12,072,779.40-18,109,169.10-7,278,000.60

Finding the Fourth Proportional to 12,072,779.40, 18,109,169.10 and 7,278,000.60

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Solution

The fourth proportional to 12,072,779.40, 18,109,169.10 and 7,278,000.60 is: 10,917,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,072,779.40 : 18,109,169.10 = 7,278,000.60 : x
  2. Step 2: Convert to fraction form
    12,072,779.40/18,109,169.10 = 7,278,000.60/x
  3. Step 3: Cross multiply
    12,072,779.40x = 18,109,169.10 × 7,278,000.60
  4. Step 4: Simplify right side
    12,072,779.40x = 131,798,543,575,301.47
  5. Step 5: Solve for x
    x = 131,798,543,575,301.47/12,072,779.40
  6. Step 6: Final answer
    x = 10,917,000.90

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1.5x scale

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.