Home / 12,688.72-17,511.24-7,101.52

Finding the Fourth Proportional to 12,688.72, 17,511.24 and 7,101.52

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Solution

The fourth proportional to 12,688.72, 17,511.24 and 7,101.52 is: 9,800.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,688.72 : 17,511.24 = 7,101.52 : x
  2. Step 2: Convert to fraction form
    12,688.72/17,511.24 = 7,101.52/x
  3. Step 3: Cross multiply
    12,688.72x = 17,511.24 × 7,101.52
  4. Step 4: Simplify right side
    12,688.72x = 124,356,421.08
  5. Step 5: Solve for x
    x = 124,356,421.08/12,688.72
  6. Step 6: Final answer
    x = 9,800.55

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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.