Home / 12,688.20-17,509.28-7,022.93

Finding the Fourth Proportional to 12,688.20, 17,509.28 and 7,022.93

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Solution

The fourth proportional to 12,688.20, 17,509.28 and 7,022.93 is: 9,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.20 : 17,509.28 = 7,022.93 : x
  2. Step 2: Convert to fraction form
    12,688.20/17,509.28 = 7,022.93/x
  3. Step 3: Cross multiply
    12,688.20x = 17,509.28 × 7,022.93
  4. Step 4: Simplify right side
    12,688.20x = 122,966,325.13
  5. Step 5: Solve for x
    x = 122,966,325.13/12,688.20
  6. Step 6: Final answer
    x = 9,691.39

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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.