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Finding the Fourth Proportional to 13,637.80, 18,798.71 and 12,493.72

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Solution

The fourth proportional to 13,637.80, 18,798.71 and 12,493.72 is: 17,221.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,637.80 : 18,798.71 = 12,493.72 : x
  2. Step 2: Convert to fraction form
    13,637.80/18,798.71 = 12,493.72/x
  3. Step 3: Cross multiply
    13,637.80x = 18,798.71 × 12,493.72
  4. Step 4: Simplify right side
    13,637.80x = 234,865,803.34
  5. Step 5: Solve for x
    x = 234,865,803.34/13,637.80
  6. Step 6: Final answer
    x = 17,221.68

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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.