Home / 25,140.12-37,718.38-11,990.78

Finding the Fourth Proportional to 25,140.12, 37,718.38 and 11,990.78

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Solution

The fourth proportional to 25,140.12, 37,718.38 and 11,990.78 is: 17,990.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,140.12 : 37,718.38 = 11,990.78 : x
  2. Step 2: Convert to fraction form
    25,140.12/37,718.38 = 11,990.78/x
  3. Step 3: Cross multiply
    25,140.12x = 37,718.38 × 11,990.78
  4. Step 4: Simplify right side
    25,140.12x = 452,272,909.09
  5. Step 5: Solve for x
    x = 452,272,909.09/25,140.12
  6. Step 6: Final answer
    x = 17,990.08

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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.