Home / 6,451.84-8,921.40-5,123.20

Finding the Fourth Proportional to 6,451.84, 8,921.40 and 5,123.20

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Solution

The fourth proportional to 6,451.84, 8,921.40 and 5,123.20 is: 7,084.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,451.84 : 8,921.40 = 5,123.20 : x
  2. Step 2: Convert to fraction form
    6,451.84/8,921.40 = 5,123.20/x
  3. Step 3: Cross multiply
    6,451.84x = 8,921.40 × 5,123.20
  4. Step 4: Simplify right side
    6,451.84x = 45,706,116.48
  5. Step 5: Solve for x
    x = 45,706,116.48/6,451.84
  6. Step 6: Final answer
    x = 7,084.20

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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.