Home / 20,506.40-28,301.52-11,555.63

Finding the Fourth Proportional to 20,506.40, 28,301.52 and 11,555.63

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Solution

The fourth proportional to 20,506.40, 28,301.52 and 11,555.63 is: 15,948.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,506.40 : 28,301.52 = 11,555.63 : x
  2. Step 2: Convert to fraction form
    20,506.40/28,301.52 = 11,555.63/x
  3. Step 3: Cross multiply
    20,506.40x = 28,301.52 × 11,555.63
  4. Step 4: Simplify right side
    20,506.40x = 327,041,893.56
  5. Step 5: Solve for x
    x = 327,041,893.56/20,506.40
  6. Step 6: Final answer
    x = 15,948.28

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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.