Home / 13,678.28-20,510.92-6,280.55

Finding the Fourth Proportional to 13,678.28, 20,510.92 and 6,280.55

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Solution

The fourth proportional to 13,678.28, 20,510.92 and 6,280.55 is: 9,417.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.28 : 20,510.92 = 6,280.55 : x
  2. Step 2: Convert to fraction form
    13,678.28/20,510.92 = 6,280.55/x
  3. Step 3: Cross multiply
    13,678.28x = 20,510.92 × 6,280.55
  4. Step 4: Simplify right side
    13,678.28x = 128,819,858.61
  5. Step 5: Solve for x
    x = 128,819,858.61/13,678.28
  6. Step 6: Final answer
    x = 9,417.84

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1.5x scale

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.