Home / 18,681.47-28,036.58-13,949.45

Finding the Fourth Proportional to 18,681.47, 28,036.58 and 13,949.45

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Solution

The fourth proportional to 18,681.47, 28,036.58 and 13,949.45 is: 20,934.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.47 : 28,036.58 = 13,949.45 : x
  2. Step 2: Convert to fraction form
    18,681.47/28,036.58 = 13,949.45/x
  3. Step 3: Cross multiply
    18,681.47x = 28,036.58 × 13,949.45
  4. Step 4: Simplify right side
    18,681.47x = 391,094,660.95
  5. Step 5: Solve for x
    x = 391,094,660.95/18,681.47
  6. Step 6: Final answer
    x = 20,934.90

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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.