Home / 12,480,030.30-18,682,720.65-7,428,740.70

Finding the Fourth Proportional to 12,480,030.30, 18,682,720.65 and 7,428,740.70

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Solution

The fourth proportional to 12,480,030.30, 18,682,720.65 and 7,428,740.70 is: 11,120,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480,030.30 : 18,682,720.65 = 7,428,740.70 : x
  2. Step 2: Convert to fraction form
    12,480,030.30/18,682,720.65 = 7,428,740.70/x
  3. Step 3: Cross multiply
    12,480,030.30x = 18,682,720.65 × 7,428,740.70
  4. Step 4: Simplify right side
    12,480,030.30x = 138,789,087,279,385.45
  5. Step 5: Solve for x
    x = 138,789,087,279,385.45/12,480,030.30
  6. Step 6: Final answer
    x = 11,120,893.45

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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.