Home / 21,377.71-29,482.14-13,420.68

Finding the Fourth Proportional to 21,377.71, 29,482.14 and 13,420.68

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Solution

The fourth proportional to 21,377.71, 29,482.14 and 13,420.68 is: 18,508.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,377.71 : 29,482.14 = 13,420.68 : x
  2. Step 2: Convert to fraction form
    21,377.71/29,482.14 = 13,420.68/x
  3. Step 3: Cross multiply
    21,377.71x = 29,482.14 × 13,420.68
  4. Step 4: Simplify right side
    21,377.71x = 395,670,366.66
  5. Step 5: Solve for x
    x = 395,670,366.66/21,377.71
  6. Step 6: Final answer
    x = 18,508.55

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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.