Home / 10,219.39-15,334.90-3,978.59

Finding the Fourth Proportional to 10,219.39, 15,334.90 and 3,978.59

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Solution

The fourth proportional to 10,219.39, 15,334.90 and 3,978.59 is: 5,970.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,219.39 : 15,334.90 = 3,978.59 : x
  2. Step 2: Convert to fraction form
    10,219.39/15,334.90 = 3,978.59/x
  3. Step 3: Cross multiply
    10,219.39x = 15,334.90 × 3,978.59
  4. Step 4: Simplify right side
    10,219.39x = 61,011,193.17
  5. Step 5: Solve for x
    x = 61,011,193.17/10,219.39
  6. Step 6: Final answer
    x = 5,970.14

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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.