Home / 8,789.40-12,129.38-4,810.51

Finding the Fourth Proportional to 8,789.40, 12,129.38 and 4,810.51

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Solution

The fourth proportional to 8,789.40, 12,129.38 and 4,810.51 is: 6,638.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.40 : 12,129.38 = 4,810.51 : x
  2. Step 2: Convert to fraction form
    8,789.40/12,129.38 = 4,810.51/x
  3. Step 3: Cross multiply
    8,789.40x = 12,129.38 × 4,810.51
  4. Step 4: Simplify right side
    8,789.40x = 58,348,503.78
  5. Step 5: Solve for x
    x = 58,348,503.78/8,789.40
  6. Step 6: Final answer
    x = 6,638.51

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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.