Home / 20,109.95-27,721.02-15,853.40

Finding the Fourth Proportional to 20,109.95, 27,721.02 and 15,853.40

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Solution

The fourth proportional to 20,109.95, 27,721.02 and 15,853.40 is: 21,853.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.95 : 27,721.02 = 15,853.40 : x
  2. Step 2: Convert to fraction form
    20,109.95/27,721.02 = 15,853.40/x
  3. Step 3: Cross multiply
    20,109.95x = 27,721.02 × 15,853.40
  4. Step 4: Simplify right side
    20,109.95x = 439,472,418.47
  5. Step 5: Solve for x
    x = 439,472,418.47/20,109.95
  6. Step 6: Final answer
    x = 21,853.48

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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.