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Finding the Fourth Proportional to 13,777.55, 19,012.49 and 7,489.93

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Solution

The fourth proportional to 13,777.55, 19,012.49 and 7,489.93 is: 10,335.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,777.55 : 19,012.49 = 7,489.93 : x
  2. Step 2: Convert to fraction form
    13,777.55/19,012.49 = 7,489.93/x
  3. Step 3: Cross multiply
    13,777.55x = 19,012.49 × 7,489.93
  4. Step 4: Simplify right side
    13,777.55x = 142,402,124.16
  5. Step 5: Solve for x
    x = 142,402,124.16/13,777.55
  6. Step 6: Final answer
    x = 10,335.81

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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.