Home / 6,972.40-9,621.30-4,139.56

Finding the Fourth Proportional to 6,972.40, 9,621.30 and 4,139.56

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Solution

The fourth proportional to 6,972.40, 9,621.30 and 4,139.56 is: 5,712.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,972.40 : 9,621.30 = 4,139.56 : x
  2. Step 2: Convert to fraction form
    6,972.40/9,621.30 = 4,139.56/x
  3. Step 3: Cross multiply
    6,972.40x = 9,621.30 × 4,139.56
  4. Step 4: Simplify right side
    6,972.40x = 39,827,948.63
  5. Step 5: Solve for x
    x = 39,827,948.63/6,972.40
  6. Step 6: Final answer
    x = 5,712.23

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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.