Home / 28,165.12-42,248.16-10,643.20

Finding the Fourth Proportional to 28,165.12, 42,248.16 and 10,643.20

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Solution

The fourth proportional to 28,165.12, 42,248.16 and 10,643.20 is: 15,964.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,165.12 : 42,248.16 = 10,643.20 : x
  2. Step 2: Convert to fraction form
    28,165.12/42,248.16 = 10,643.20/x
  3. Step 3: Cross multiply
    28,165.12x = 42,248.16 × 10,643.20
  4. Step 4: Simplify right side
    28,165.12x = 449,655,616.51
  5. Step 5: Solve for x
    x = 449,655,616.51/28,165.12
  6. Step 6: Final answer
    x = 15,964.98

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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.