Home / 20,506.57-28,296.95-11,555.46

Finding the Fourth Proportional to 20,506.57, 28,296.95 and 11,555.46

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Solution

The fourth proportional to 20,506.57, 28,296.95 and 11,555.46 is: 15,945.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.57 : 28,296.95 = 11,555.46 : x
  2. Step 2: Convert to fraction form
    20,506.57/28,296.95 = 11,555.46/x
  3. Step 3: Cross multiply
    20,506.57x = 28,296.95 × 11,555.46
  4. Step 4: Simplify right side
    20,506.57x = 326,984,216.07
  5. Step 5: Solve for x
    x = 326,984,216.07/20,506.57
  6. Step 6: Final answer
    x = 15,945.34

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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.