Home / 13,283.28-18,330.99-7,978.19

Finding the Fourth Proportional to 13,283.28, 18,330.99 and 7,978.19

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Solution

The fourth proportional to 13,283.28, 18,330.99 and 7,978.19 is: 11,009.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,283.28 : 18,330.99 = 7,978.19 : x
  2. Step 2: Convert to fraction form
    13,283.28/18,330.99 = 7,978.19/x
  3. Step 3: Cross multiply
    13,283.28x = 18,330.99 × 7,978.19
  4. Step 4: Simplify right side
    13,283.28x = 146,248,121.11
  5. Step 5: Solve for x
    x = 146,248,121.11/13,283.28
  6. Step 6: Final answer
    x = 11,009.94

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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.