Home / 14,280.68-21,425.40-6,389.84

Finding the Fourth Proportional to 14,280.68, 21,425.40 and 6,389.84

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Solution

The fourth proportional to 14,280.68, 21,425.40 and 6,389.84 is: 9,586.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,280.68 : 21,425.40 = 6,389.84 : x
  2. Step 2: Convert to fraction form
    14,280.68/21,425.40 = 6,389.84/x
  3. Step 3: Cross multiply
    14,280.68x = 21,425.40 × 6,389.84
  4. Step 4: Simplify right side
    14,280.68x = 136,904,889.21
  5. Step 5: Solve for x
    x = 136,904,889.21/14,280.68
  6. Step 6: Final answer
    x = 9,586.72

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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.