Home / 20,108.95-27,719.65-15,852.40

Finding the Fourth Proportional to 20,108.95, 27,719.65 and 15,852.40

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Solution

The fourth proportional to 20,108.95, 27,719.65 and 15,852.40 is: 21,852.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.95 : 27,719.65 = 15,852.40 : x
  2. Step 2: Convert to fraction form
    20,108.95/27,719.65 = 15,852.40/x
  3. Step 3: Cross multiply
    20,108.95x = 27,719.65 × 15,852.40
  4. Step 4: Simplify right side
    20,108.95x = 439,422,761.80
  5. Step 5: Solve for x
    x = 439,422,761.80/20,108.95
  6. Step 6: Final answer
    x = 21,852.10

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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.