Home / 28,181.12-42,272.16-10,659.20

Finding the Fourth Proportional to 28,181.12, 42,272.16 and 10,659.20

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Solution

The fourth proportional to 28,181.12, 42,272.16 and 10,659.20 is: 15,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,181.12 : 42,272.16 = 10,659.20 : x
  2. Step 2: Convert to fraction form
    28,181.12/42,272.16 = 10,659.20/x
  3. Step 3: Cross multiply
    28,181.12x = 42,272.16 × 10,659.20
  4. Step 4: Simplify right side
    28,181.12x = 450,587,407.87
  5. Step 5: Solve for x
    x = 450,587,407.87/28,181.12
  6. Step 6: Final answer
    x = 15,988.98

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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.