Home / 21,270.29-31,905.50-6,479.15

Finding the Fourth Proportional to 21,270.29, 31,905.50 and 6,479.15

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Solution

The fourth proportional to 21,270.29, 31,905.50 and 6,479.15 is: 9,718.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.29 : 31,905.50 = 6,479.15 : x
  2. Step 2: Convert to fraction form
    21,270.29/31,905.50 = 6,479.15/x
  3. Step 3: Cross multiply
    21,270.29x = 31,905.50 × 6,479.15
  4. Step 4: Simplify right side
    21,270.29x = 206,720,328.40
  5. Step 5: Solve for x
    x = 206,720,328.40/21,270.29
  6. Step 6: Final answer
    x = 9,718.74

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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.