Home / 13,680.07-18,877.36-7,713.21

Finding the Fourth Proportional to 13,680.07, 18,877.36 and 7,713.21

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Solution

The fourth proportional to 13,680.07, 18,877.36 and 7,713.21 is: 10,643.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.07 : 18,877.36 = 7,713.21 : x
  2. Step 2: Convert to fraction form
    13,680.07/18,877.36 = 7,713.21/x
  3. Step 3: Cross multiply
    13,680.07x = 18,877.36 × 7,713.21
  4. Step 4: Simplify right side
    13,680.07x = 145,605,041.93
  5. Step 5: Solve for x
    x = 145,605,041.93/13,680.07
  6. Step 6: Final answer
    x = 10,643.59

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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.