Home / 4,685.78-7,030.16-2,931.90

Finding the Fourth Proportional to 4,685.78, 7,030.16 and 2,931.90

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Solution

The fourth proportional to 4,685.78, 7,030.16 and 2,931.90 is: 4,398.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,685.78 : 7,030.16 = 2,931.90 : x
  2. Step 2: Convert to fraction form
    4,685.78/7,030.16 = 2,931.90/x
  3. Step 3: Cross multiply
    4,685.78x = 7,030.16 × 2,931.90
  4. Step 4: Simplify right side
    4,685.78x = 20,611,726.10
  5. Step 5: Solve for x
    x = 20,611,726.10/4,685.78
  6. Step 6: Final answer
    x = 4,398.78

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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.