Home / 8,975.36-12,386.88-5,439.68

Finding the Fourth Proportional to 8,975.36, 12,386.88 and 5,439.68

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Solution

The fourth proportional to 8,975.36, 12,386.88 and 5,439.68 is: 7,507.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,975.36 : 12,386.88 = 5,439.68 : x
  2. Step 2: Convert to fraction form
    8,975.36/12,386.88 = 5,439.68/x
  3. Step 3: Cross multiply
    8,975.36x = 12,386.88 × 5,439.68
  4. Step 4: Simplify right side
    8,975.36x = 67,380,663.40
  5. Step 5: Solve for x
    x = 67,380,663.40/8,975.36
  6. Step 6: Final answer
    x = 7,507.29

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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.