Home / 28,778.28-39,720.14-19,341.37

Finding the Fourth Proportional to 28,778.28, 39,720.14 and 19,341.37

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Solution

The fourth proportional to 28,778.28, 39,720.14 and 19,341.37 is: 26,695.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,778.28 : 39,720.14 = 19,341.37 : x
  2. Step 2: Convert to fraction form
    28,778.28/39,720.14 = 19,341.37/x
  3. Step 3: Cross multiply
    28,778.28x = 39,720.14 × 19,341.37
  4. Step 4: Simplify right side
    28,778.28x = 768,241,924.19
  5. Step 5: Solve for x
    x = 768,241,924.19/28,778.28
  6. Step 6: Final answer
    x = 26,695.20

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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.