Home / 20,583.60-28,405.40-11,152.16

Finding the Fourth Proportional to 20,583.60, 28,405.40 and 11,152.16

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Solution

The fourth proportional to 20,583.60, 28,405.40 and 11,152.16 is: 15,389.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,583.60 : 28,405.40 = 11,152.16 : x
  2. Step 2: Convert to fraction form
    20,583.60/28,405.40 = 11,152.16/x
  3. Step 3: Cross multiply
    20,583.60x = 28,405.40 × 11,152.16
  4. Step 4: Simplify right side
    20,583.60x = 316,781,367.88
  5. Step 5: Solve for x
    x = 316,781,367.88/20,583.60
  6. Step 6: Final answer
    x = 15,389.99

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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.