Home / 20,612,139.20-30,930,018.60-7,841,808.80

Finding the Fourth Proportional to 20,612,139.20, 30,930,018.60 and 7,841,808.80

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Solution

The fourth proportional to 20,612,139.20, 30,930,018.60 and 7,841,808.80 is: 11,767,206.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612,139.20 : 30,930,018.60 = 7,841,808.80 : x
  2. Step 2: Convert to fraction form
    20,612,139.20/30,930,018.60 = 7,841,808.80/x
  3. Step 3: Cross multiply
    20,612,139.20x = 30,930,018.60 × 7,841,808.80
  4. Step 4: Simplify right side
    20,612,139.20x = 242,547,292,041,643.69
  5. Step 5: Solve for x
    x = 242,547,292,041,643.69/20,612,139.20
  6. Step 6: Final answer
    x = 11,767,206.19

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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.