Home / 20,671.61-28,526.81-11,240.15

Finding the Fourth Proportional to 20,671.61, 28,526.81 and 11,240.15

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Solution

The fourth proportional to 20,671.61, 28,526.81 and 11,240.15 is: 15,511.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,671.61 : 28,526.81 = 11,240.15 : x
  2. Step 2: Convert to fraction form
    20,671.61/28,526.81 = 11,240.15/x
  3. Step 3: Cross multiply
    20,671.61x = 28,526.81 × 11,240.15
  4. Step 4: Simplify right side
    20,671.61x = 320,645,424.59
  5. Step 5: Solve for x
    x = 320,645,424.59/20,671.61
  6. Step 6: Final answer
    x = 15,511.39

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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.