Home / 20,640.08-28,486.47-16,648.80

Finding the Fourth Proportional to 20,640.08, 28,486.47 and 16,648.80

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Solution

The fourth proportional to 20,640.08, 28,486.47 and 16,648.80 is: 22,977.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.08 : 28,486.47 = 16,648.80 : x
  2. Step 2: Convert to fraction form
    20,640.08/28,486.47 = 16,648.80/x
  3. Step 3: Cross multiply
    20,640.08x = 28,486.47 × 16,648.80
  4. Step 4: Simplify right side
    20,640.08x = 474,265,541.74
  5. Step 5: Solve for x
    x = 474,265,541.74/20,640.08
  6. Step 6: Final answer
    x = 22,977.89

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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.