Home / 14,278.40-21,417.60-9,612.80

Finding the Fourth Proportional to 14,278.40, 21,417.60 and 9,612.80

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Solution

The fourth proportional to 14,278.40, 21,417.60 and 9,612.80 is: 14,419.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.40 : 21,417.60 = 9,612.80 : x
  2. Step 2: Convert to fraction form
    14,278.40/21,417.60 = 9,612.80/x
  3. Step 3: Cross multiply
    14,278.40x = 21,417.60 × 9,612.80
  4. Step 4: Simplify right side
    14,278.40x = 205,883,105.28
  5. Step 5: Solve for x
    x = 205,883,105.28/14,278.40
  6. Step 6: Final answer
    x = 14,419.20

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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.