Home / 10,221.28-14,111.18-6,639.46

Finding the Fourth Proportional to 10,221.28, 14,111.18 and 6,639.46

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Solution

The fourth proportional to 10,221.28, 14,111.18 and 6,639.46 is: 9,166.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.28 : 14,111.18 = 6,639.46 : x
  2. Step 2: Convert to fraction form
    10,221.28/14,111.18 = 6,639.46/x
  3. Step 3: Cross multiply
    10,221.28x = 14,111.18 × 6,639.46
  4. Step 4: Simplify right side
    10,221.28x = 93,690,615.16
  5. Step 5: Solve for x
    x = 93,690,615.16/10,221.28
  6. Step 6: Final answer
    x = 9,166.23

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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.