Home / 30,960.03-42,737.93-20,902.10

Finding the Fourth Proportional to 30,960.03, 42,737.93 and 20,902.10

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Solution

The fourth proportional to 30,960.03, 42,737.93 and 20,902.10 is: 28,853.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,960.03 : 42,737.93 = 20,902.10 : x
  2. Step 2: Convert to fraction form
    30,960.03/42,737.93 = 20,902.10/x
  3. Step 3: Cross multiply
    30,960.03x = 42,737.93 × 20,902.10
  4. Step 4: Simplify right side
    30,960.03x = 893,312,275.30
  5. Step 5: Solve for x
    x = 893,312,275.30/30,960.03
  6. Step 6: Final answer
    x = 28,853.73

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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.