Home / 10,385.40-14,331.90-5,669.79

Finding the Fourth Proportional to 10,385.40, 14,331.90 and 5,669.79

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Solution

The fourth proportional to 10,385.40, 14,331.90 and 5,669.79 is: 7,824.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,385.40 : 14,331.90 = 5,669.79 : x
  2. Step 2: Convert to fraction form
    10,385.40/14,331.90 = 5,669.79/x
  3. Step 3: Cross multiply
    10,385.40x = 14,331.90 × 5,669.79
  4. Step 4: Simplify right side
    10,385.40x = 81,258,863.30
  5. Step 5: Solve for x
    x = 81,258,863.30/10,385.40
  6. Step 6: Final answer
    x = 7,824.34

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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.