Home / 30,972.60-42,737.40-18,232.20

Finding the Fourth Proportional to 30,972.60, 42,737.40 and 18,232.20

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Solution

The fourth proportional to 30,972.60, 42,737.40 and 18,232.20 is: 25,157.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.60 : 42,737.40 = 18,232.20 : x
  2. Step 2: Convert to fraction form
    30,972.60/42,737.40 = 18,232.20/x
  3. Step 3: Cross multiply
    30,972.60x = 42,737.40 × 18,232.20
  4. Step 4: Simplify right side
    30,972.60x = 779,196,824.28
  5. Step 5: Solve for x
    x = 779,196,824.28/30,972.60
  6. Step 6: Final answer
    x = 25,157.62

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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.