Home / 8,928.36-12,319.56-5,389.20

Finding the Fourth Proportional to 8,928.36, 12,319.56 and 5,389.20

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Solution

The fourth proportional to 8,928.36, 12,319.56 and 5,389.20 is: 7,436.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,928.36 : 12,319.56 = 5,389.20 : x
  2. Step 2: Convert to fraction form
    8,928.36/12,319.56 = 5,389.20/x
  3. Step 3: Cross multiply
    8,928.36x = 12,319.56 × 5,389.20
  4. Step 4: Simplify right side
    8,928.36x = 66,392,572.75
  5. Step 5: Solve for x
    x = 66,392,572.75/8,928.36
  6. Step 6: Final answer
    x = 7,436.14

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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.