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Finding the Fourth Proportional to 8,398.99, 12,598.08 and 2,159.20

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Solution

The fourth proportional to 8,398.99, 12,598.08 and 2,159.20 is: 3,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,398.99 : 12,598.08 = 2,159.20 : x
  2. Step 2: Convert to fraction form
    8,398.99/12,598.08 = 2,159.20/x
  3. Step 3: Cross multiply
    8,398.99x = 12,598.08 × 2,159.20
  4. Step 4: Simplify right side
    8,398.99x = 27,201,774.34
  5. Step 5: Solve for x
    x = 27,201,774.34/8,398.99
  6. Step 6: Final answer
    x = 3,238.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.