Home / 20,795.19-28,689.21-12,823.59

Finding the Fourth Proportional to 20,795.19, 28,689.21 and 12,823.59

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Solution

The fourth proportional to 20,795.19, 28,689.21 and 12,823.59 is: 17,691.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.19 : 28,689.21 = 12,823.59 : x
  2. Step 2: Convert to fraction form
    20,795.19/28,689.21 = 12,823.59/x
  3. Step 3: Cross multiply
    20,795.19x = 28,689.21 × 12,823.59
  4. Step 4: Simplify right side
    20,795.19x = 367,898,666.46
  5. Step 5: Solve for x
    x = 367,898,666.46/20,795.19
  6. Step 6: Final answer
    x = 17,691.53

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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.