Home / 21,180.84-31,781.50-14,980.70

Finding the Fourth Proportional to 21,180.84, 31,781.50 and 14,980.70

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Solution

The fourth proportional to 21,180.84, 31,781.50 and 14,980.70 is: 22,478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,180.84 : 31,781.50 = 14,980.70 : x
  2. Step 2: Convert to fraction form
    21,180.84/31,781.50 = 14,980.70/x
  3. Step 3: Cross multiply
    21,180.84x = 31,781.50 × 14,980.70
  4. Step 4: Simplify right side
    21,180.84x = 476,109,117.05
  5. Step 5: Solve for x
    x = 476,109,117.05/21,180.84
  6. Step 6: Final answer
    x = 22,478.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.