Home / 20,438.24-30,478.52-20,251.40

Finding the Fourth Proportional to 20,438.24, 30,478.52 and 20,251.40

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Solution

The fourth proportional to 20,438.24, 30,478.52 and 20,251.40 is: 30,199.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.24 : 30,478.52 = 20,251.40 : x
  2. Step 2: Convert to fraction form
    20,438.24/30,478.52 = 20,251.40/x
  3. Step 3: Cross multiply
    20,438.24x = 30,478.52 × 20,251.40
  4. Step 4: Simplify right side
    20,438.24x = 617,232,699.93
  5. Step 5: Solve for x
    x = 617,232,699.93/20,438.24
  6. Step 6: Final answer
    x = 30,199.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.