Home / 13,599.90-18,770.23-7,938

Finding the Fourth Proportional to 13,599.90, 18,770.23 and 7,938

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Solution

The fourth proportional to 13,599.90, 18,770.23 and 7,938 is: 10,955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.90 : 18,770.23 = 7,938 : x
  2. Step 2: Convert to fraction form
    13,599.90/18,770.23 = 7,938/x
  3. Step 3: Cross multiply
    13,599.90x = 18,770.23 × 7,938
  4. Step 4: Simplify right side
    13,599.90x = 148,998,095.66
  5. Step 5: Solve for x
    x = 148,998,095.66/13,599.90
  6. Step 6: Final answer
    x = 10,955.82

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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.