Home / 28,431.12-42,665.14-12,848.88

Finding the Fourth Proportional to 28,431.12, 42,665.14 and 12,848.88

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Solution

The fourth proportional to 28,431.12, 42,665.14 and 12,848.88 is: 19,281.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.12 : 42,665.14 = 12,848.88 : x
  2. Step 2: Convert to fraction form
    28,431.12/42,665.14 = 12,848.88/x
  3. Step 3: Cross multiply
    28,431.12x = 42,665.14 × 12,848.88
  4. Step 4: Simplify right side
    28,431.12x = 548,199,264.04
  5. Step 5: Solve for x
    x = 548,199,264.04/28,431.12
  6. Step 6: Final answer
    x = 19,281.66

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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.