Home / 12,480,005.80-18,720,008.70-7,086,572.20

Finding the Fourth Proportional to 12,480,005.80, 18,720,008.70 and 7,086,572.20

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Solution

The fourth proportional to 12,480,005.80, 18,720,008.70 and 7,086,572.20 is: 10,629,858.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480,005.80 : 18,720,008.70 = 7,086,572.20 : x
  2. Step 2: Convert to fraction form
    12,480,005.80/18,720,008.70 = 7,086,572.20/x
  3. Step 3: Cross multiply
    12,480,005.80x = 18,720,008.70 × 7,086,572.20
  4. Step 4: Simplify right side
    12,480,005.80x = 132,660,693,237,178.14
  5. Step 5: Solve for x
    x = 132,660,693,237,178.14/12,480,005.80
  6. Step 6: Final answer
    x = 10,629,858.30

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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.