Home / 13,438.72-18,545.79-7,772.91

Finding the Fourth Proportional to 13,438.72, 18,545.79 and 7,772.91

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Solution

The fourth proportional to 13,438.72, 18,545.79 and 7,772.91 is: 10,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.72 : 18,545.79 = 7,772.91 : x
  2. Step 2: Convert to fraction form
    13,438.72/18,545.79 = 7,772.91/x
  3. Step 3: Cross multiply
    13,438.72x = 18,545.79 × 7,772.91
  4. Step 4: Simplify right side
    13,438.72x = 144,154,756.55
  5. Step 5: Solve for x
    x = 144,154,756.55/13,438.72
  6. Step 6: Final answer
    x = 10,726.82

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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.