Home / 21,274.85-29,340.18-13,317.80

Finding the Fourth Proportional to 21,274.85, 29,340.18 and 13,317.80

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Solution

The fourth proportional to 21,274.85, 29,340.18 and 13,317.80 is: 18,366.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.85 : 29,340.18 = 13,317.80 : x
  2. Step 2: Convert to fraction form
    21,274.85/29,340.18 = 13,317.80/x
  3. Step 3: Cross multiply
    21,274.85x = 29,340.18 × 13,317.80
  4. Step 4: Simplify right side
    21,274.85x = 390,746,649.20
  5. Step 5: Solve for x
    x = 390,746,649.20/21,274.85
  6. Step 6: Final answer
    x = 18,366.60

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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.