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Finding the Fourth Proportional to 12,429.68, 17,152.95 and 6,840.68

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Solution

The fourth proportional to 12,429.68, 17,152.95 and 6,840.68 is: 9,440.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,429.68 : 17,152.95 = 6,840.68 : x
  2. Step 2: Convert to fraction form
    12,429.68/17,152.95 = 6,840.68/x
  3. Step 3: Cross multiply
    12,429.68x = 17,152.95 × 6,840.68
  4. Step 4: Simplify right side
    12,429.68x = 117,337,756.24
  5. Step 5: Solve for x
    x = 117,337,756.24/12,429.68
  6. Step 6: Final answer
    x = 9,440.13

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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.