Home / 20,671.68-28,526.88-11,240.16

Finding the Fourth Proportional to 20,671.68, 28,526.88 and 11,240.16

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Solution

The fourth proportional to 20,671.68, 28,526.88 and 11,240.16 is: 15,511.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.68 : 28,526.88 = 11,240.16 : x
  2. Step 2: Convert to fraction form
    20,671.68/28,526.88 = 11,240.16/x
  3. Step 3: Cross multiply
    20,671.68x = 28,526.88 × 11,240.16
  4. Step 4: Simplify right side
    20,671.68x = 320,646,695.50
  5. Step 5: Solve for x
    x = 320,646,695.50/20,671.68
  6. Step 6: Final answer
    x = 15,511.40

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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.