Home / 21,520.17-29,700.13-12,570.58

Finding the Fourth Proportional to 21,520.17, 29,700.13 and 12,570.58

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Solution

The fourth proportional to 21,520.17, 29,700.13 and 12,570.58 is: 17,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.17 : 29,700.13 = 12,570.58 : x
  2. Step 2: Convert to fraction form
    21,520.17/29,700.13 = 12,570.58/x
  3. Step 3: Cross multiply
    21,520.17x = 29,700.13 × 12,570.58
  4. Step 4: Simplify right side
    21,520.17x = 373,347,860.18
  5. Step 5: Solve for x
    x = 373,347,860.18/21,520.17
  6. Step 6: Final answer
    x = 17,348.74

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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.