Home / 21,171.64-29,217-12,219.52

Finding the Fourth Proportional to 21,171.64, 29,217 and 12,219.52

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Solution

The fourth proportional to 21,171.64, 29,217 and 12,219.52 is: 16,863.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.64 : 29,217 = 12,219.52 : x
  2. Step 2: Convert to fraction form
    21,171.64/29,217 = 12,219.52/x
  3. Step 3: Cross multiply
    21,171.64x = 29,217 × 12,219.52
  4. Step 4: Simplify right side
    21,171.64x = 357,017,715.84
  5. Step 5: Solve for x
    x = 357,017,715.84/21,171.64
  6. Step 6: Final answer
    x = 16,863.02

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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.