Home / 8,789.49-12,139.70-6,410.21

Finding the Fourth Proportional to 8,789.49, 12,139.70 and 6,410.21

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Solution

The fourth proportional to 8,789.49, 12,139.70 and 6,410.21 is: 8,853.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.49 : 12,139.70 = 6,410.21 : x
  2. Step 2: Convert to fraction form
    8,789.49/12,139.70 = 6,410.21/x
  3. Step 3: Cross multiply
    8,789.49x = 12,139.70 × 6,410.21
  4. Step 4: Simplify right side
    8,789.49x = 77,818,026.34
  5. Step 5: Solve for x
    x = 77,818,026.34/8,789.49
  6. Step 6: Final answer
    x = 8,853.53

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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.