Home / 21,264.72-29,344.86-12,312.60

Finding the Fourth Proportional to 21,264.72, 29,344.86 and 12,312.60

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Solution

The fourth proportional to 21,264.72, 29,344.86 and 12,312.60 is: 16,991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,264.72 : 29,344.86 = 12,312.60 : x
  2. Step 2: Convert to fraction form
    21,264.72/29,344.86 = 12,312.60/x
  3. Step 3: Cross multiply
    21,264.72x = 29,344.86 × 12,312.60
  4. Step 4: Simplify right side
    21,264.72x = 361,311,523.24
  5. Step 5: Solve for x
    x = 361,311,523.24/21,264.72
  6. Step 6: Final answer
    x = 16,991.13

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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.