Home / 13,307.97-18,364.32-7,638.78

Finding the Fourth Proportional to 13,307.97, 18,364.32 and 7,638.78

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Solution

The fourth proportional to 13,307.97, 18,364.32 and 7,638.78 is: 10,541.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,307.97 : 18,364.32 = 7,638.78 : x
  2. Step 2: Convert to fraction form
    13,307.97/18,364.32 = 7,638.78/x
  3. Step 3: Cross multiply
    13,307.97x = 18,364.32 × 7,638.78
  4. Step 4: Simplify right side
    13,307.97x = 140,281,000.33
  5. Step 5: Solve for x
    x = 140,281,000.33/13,307.97
  6. Step 6: Final answer
    x = 10,541.13

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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.