Home / 8,938.80-12,328.74-5,398.29

Finding the Fourth Proportional to 8,938.80, 12,328.74 and 5,398.29

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Solution

The fourth proportional to 8,938.80, 12,328.74 and 5,398.29 is: 7,445.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938.80 : 12,328.74 = 5,398.29 : x
  2. Step 2: Convert to fraction form
    8,938.80/12,328.74 = 5,398.29/x
  3. Step 3: Cross multiply
    8,938.80x = 12,328.74 × 5,398.29
  4. Step 4: Simplify right side
    8,938.80x = 66,554,113.85
  5. Step 5: Solve for x
    x = 66,554,113.85/8,938.80
  6. Step 6: Final answer
    x = 7,445.53

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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.