Home / 20,528.83-30,828.42-12,677.80

Finding the Fourth Proportional to 20,528.83, 30,828.42 and 12,677.80

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Solution

The fourth proportional to 20,528.83, 30,828.42 and 12,677.80 is: 19,038.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.83 : 30,828.42 = 12,677.80 : x
  2. Step 2: Convert to fraction form
    20,528.83/30,828.42 = 12,677.80/x
  3. Step 3: Cross multiply
    20,528.83x = 30,828.42 × 12,677.80
  4. Step 4: Simplify right side
    20,528.83x = 390,836,689.52
  5. Step 5: Solve for x
    x = 390,836,689.52/20,528.83
  6. Step 6: Final answer
    x = 19,038.43

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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.