Home / 22,715.12-31,346.87-12,643.35

Finding the Fourth Proportional to 22,715.12, 31,346.87 and 12,643.35

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Solution

The fourth proportional to 22,715.12, 31,346.87 and 12,643.35 is: 17,447.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,715.12 : 31,346.87 = 12,643.35 : x
  2. Step 2: Convert to fraction form
    22,715.12/31,346.87 = 12,643.35/x
  3. Step 3: Cross multiply
    22,715.12x = 31,346.87 × 12,643.35
  4. Step 4: Simplify right side
    22,715.12x = 396,329,268.05
  5. Step 5: Solve for x
    x = 396,329,268.05/22,715.12
  6. Step 6: Final answer
    x = 17,447.82

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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.