Home / 20,778.12-28,670.01-12,281.63

Finding the Fourth Proportional to 20,778.12, 28,670.01 and 12,281.63

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Solution

The fourth proportional to 20,778.12, 28,670.01 and 12,281.63 is: 16,946.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.12 : 28,670.01 = 12,281.63 : x
  2. Step 2: Convert to fraction form
    20,778.12/28,670.01 = 12,281.63/x
  3. Step 3: Cross multiply
    20,778.12x = 28,670.01 × 12,281.63
  4. Step 4: Simplify right side
    20,778.12x = 352,114,265.51
  5. Step 5: Solve for x
    x = 352,114,265.51/20,778.12
  6. Step 6: Final answer
    x = 16,946.40

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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.