Home / 8,905.68-12,288.77-5,130.08

Finding the Fourth Proportional to 8,905.68, 12,288.77 and 5,130.08

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Solution

The fourth proportional to 8,905.68, 12,288.77 and 5,130.08 is: 7,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.68 : 12,288.77 = 5,130.08 : x
  2. Step 2: Convert to fraction form
    8,905.68/12,288.77 = 5,130.08/x
  3. Step 3: Cross multiply
    8,905.68x = 12,288.77 × 5,130.08
  4. Step 4: Simplify right side
    8,905.68x = 63,042,373.20
  5. Step 5: Solve for x
    x = 63,042,373.20/8,905.68
  6. Step 6: Final answer
    x = 7,078.89

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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.