Home / 20,130.23-27,805.85-15,320.95

Finding the Fourth Proportional to 20,130.23, 27,805.85 and 15,320.95

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Solution

The fourth proportional to 20,130.23, 27,805.85 and 15,320.95 is: 21,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.23 : 27,805.85 = 15,320.95 : x
  2. Step 2: Convert to fraction form
    20,130.23/27,805.85 = 15,320.95/x
  3. Step 3: Cross multiply
    20,130.23x = 27,805.85 × 15,320.95
  4. Step 4: Simplify right side
    20,130.23x = 426,012,006.35
  5. Step 5: Solve for x
    x = 426,012,006.35/20,130.23
  6. Step 6: Final answer
    x = 21,162.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.