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Finding the Fourth Proportional to 12,637.95, 18,920.19 and 7,356.87

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Solution

The fourth proportional to 12,637.95, 18,920.19 and 7,356.87 is: 11,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,637.95 : 18,920.19 = 7,356.87 : x
  2. Step 2: Convert to fraction form
    12,637.95/18,920.19 = 7,356.87/x
  3. Step 3: Cross multiply
    12,637.95x = 18,920.19 × 7,356.87
  4. Step 4: Simplify right side
    12,637.95x = 139,193,378.21
  5. Step 5: Solve for x
    x = 139,193,378.21/12,637.95
  6. Step 6: Final answer
    x = 11,013.92

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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.