Home / 30,960.29-42,738.27-20,902.35

Finding the Fourth Proportional to 30,960.29, 42,738.27 and 20,902.35

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Solution

The fourth proportional to 30,960.29, 42,738.27 and 20,902.35 is: 28,854.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.29 : 42,738.27 = 20,902.35 : x
  2. Step 2: Convert to fraction form
    30,960.29/42,738.27 = 20,902.35/x
  3. Step 3: Cross multiply
    30,960.29x = 42,738.27 × 20,902.35
  4. Step 4: Simplify right side
    30,960.29x = 893,330,064.24
  5. Step 5: Solve for x
    x = 893,330,064.24/30,960.29
  6. Step 6: Final answer
    x = 28,854.06

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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.