Home / 8,985.18-12,399.57-5,209.08

Finding the Fourth Proportional to 8,985.18, 12,399.57 and 5,209.08

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Solution

The fourth proportional to 8,985.18, 12,399.57 and 5,209.08 is: 7,188.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.18 : 12,399.57 = 5,209.08 : x
  2. Step 2: Convert to fraction form
    8,985.18/12,399.57 = 5,209.08/x
  3. Step 3: Cross multiply
    8,985.18x = 12,399.57 × 5,209.08
  4. Step 4: Simplify right side
    8,985.18x = 64,590,352.10
  5. Step 5: Solve for x
    x = 64,590,352.10/8,985.18
  6. Step 6: Final answer
    x = 7,188.54

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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.