Home / 20,477.71-30,677.18-12,557.10

Finding the Fourth Proportional to 20,477.71, 30,677.18 and 12,557.10

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Solution

The fourth proportional to 20,477.71, 30,677.18 and 12,557.10 is: 18,811.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,477.71 : 30,677.18 = 12,557.10 : x
  2. Step 2: Convert to fraction form
    20,477.71/30,677.18 = 12,557.10/x
  3. Step 3: Cross multiply
    20,477.71x = 30,677.18 × 12,557.10
  4. Step 4: Simplify right side
    20,477.71x = 385,216,469.23
  5. Step 5: Solve for x
    x = 385,216,469.23/20,477.71
  6. Step 6: Final answer
    x = 18,811.50

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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.