Home / 9,928.40-13,701.20-5,391.08

Finding the Fourth Proportional to 9,928.40, 13,701.20 and 5,391.08

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Solution

The fourth proportional to 9,928.40, 13,701.20 and 5,391.08 is: 7,439.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,928.40 : 13,701.20 = 5,391.08 : x
  2. Step 2: Convert to fraction form
    9,928.40/13,701.20 = 5,391.08/x
  3. Step 3: Cross multiply
    9,928.40x = 13,701.20 × 5,391.08
  4. Step 4: Simplify right side
    9,928.40x = 73,864,290.07
  5. Step 5: Solve for x
    x = 73,864,290.07/9,928.40
  6. Step 6: Final answer
    x = 7,439.70

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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.