Home / 8,986.90-12,400.75-5,210.00

Finding the Fourth Proportional to 8,986.90, 12,400.75 and 5,210.00

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Solution

The fourth proportional to 8,986.90, 12,400.75 and 5,210.00 is: 7,189.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,986.90 : 12,400.75 = 5,210.00 : x
  2. Step 2: Convert to fraction form
    8,986.90/12,400.75 = 5,210.00/x
  3. Step 3: Cross multiply
    8,986.90x = 12,400.75 × 5,210.00
  4. Step 4: Simplify right side
    8,986.90x = 64,607,834.33
  5. Step 5: Solve for x
    x = 64,607,834.33/8,986.90
  6. Step 6: Final answer
    x = 7,189.11

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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.