Home / 28,415.11-42,568.13-15,897.21

Finding the Fourth Proportional to 28,415.11, 42,568.13 and 15,897.21

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Solution

The fourth proportional to 28,415.11, 42,568.13 and 15,897.21 is: 23,815.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,415.11 : 42,568.13 = 15,897.21 : x
  2. Step 2: Convert to fraction form
    28,415.11/42,568.13 = 15,897.21/x
  3. Step 3: Cross multiply
    28,415.11x = 42,568.13 × 15,897.21
  4. Step 4: Simplify right side
    28,415.11x = 676,714,621.48
  5. Step 5: Solve for x
    x = 676,714,621.48/28,415.11
  6. Step 6: Final answer
    x = 23,815.31

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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.