Home / 20,233.20-30,349.80-12,870.30

Finding the Fourth Proportional to 20,233.20, 30,349.80 and 12,870.30

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Solution

The fourth proportional to 20,233.20, 30,349.80 and 12,870.30 is: 19,305.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,233.20 : 30,349.80 = 12,870.30 : x
  2. Step 2: Convert to fraction form
    20,233.20/30,349.80 = 12,870.30/x
  3. Step 3: Cross multiply
    20,233.20x = 30,349.80 × 12,870.30
  4. Step 4: Simplify right side
    20,233.20x = 390,611,030.94
  5. Step 5: Solve for x
    x = 390,611,030.94/20,233.20
  6. Step 6: Final answer
    x = 19,305.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.