Home / 20,409.72-28,176.14-13,730.48

Finding the Fourth Proportional to 20,409.72, 28,176.14 and 13,730.48

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Solution

The fourth proportional to 20,409.72, 28,176.14 and 13,730.48 is: 18,955.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.72 : 28,176.14 = 13,730.48 : x
  2. Step 2: Convert to fraction form
    20,409.72/28,176.14 = 13,730.48/x
  3. Step 3: Cross multiply
    20,409.72x = 28,176.14 × 13,730.48
  4. Step 4: Simplify right side
    20,409.72x = 386,871,926.75
  5. Step 5: Solve for x
    x = 386,871,926.75/20,409.72
  6. Step 6: Final answer
    x = 18,955.28

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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.