Home / 20,591.07-28,416.20-12,637.68

Finding the Fourth Proportional to 20,591.07, 28,416.20 and 12,637.68

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Solution

The fourth proportional to 20,591.07, 28,416.20 and 12,637.68 is: 17,440.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,591.07 : 28,416.20 = 12,637.68 : x
  2. Step 2: Convert to fraction form
    20,591.07/28,416.20 = 12,637.68/x
  3. Step 3: Cross multiply
    20,591.07x = 28,416.20 × 12,637.68
  4. Step 4: Simplify right side
    20,591.07x = 359,114,779.23
  5. Step 5: Solve for x
    x = 359,114,779.23/20,591.07
  6. Step 6: Final answer
    x = 17,440.32

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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.