Home / 13,400.72-18,489.48-7,807.76

Finding the Fourth Proportional to 13,400.72, 18,489.48 and 7,807.76

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Solution

The fourth proportional to 13,400.72, 18,489.48 and 7,807.76 is: 10,772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.72 : 18,489.48 = 7,807.76 : x
  2. Step 2: Convert to fraction form
    13,400.72/18,489.48 = 7,807.76/x
  3. Step 3: Cross multiply
    13,400.72x = 18,489.48 × 7,807.76
  4. Step 4: Simplify right side
    13,400.72x = 144,361,422.36
  5. Step 5: Solve for x
    x = 144,361,422.36/13,400.72
  6. Step 6: Final answer
    x = 10,772.66

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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.