Home / 20,752.16-28,642.52-12,688.63

Finding the Fourth Proportional to 20,752.16, 28,642.52 and 12,688.63

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Solution

The fourth proportional to 20,752.16, 28,642.52 and 12,688.63 is: 17,513.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.16 : 28,642.52 = 12,688.63 : x
  2. Step 2: Convert to fraction form
    20,752.16/28,642.52 = 12,688.63/x
  3. Step 3: Cross multiply
    20,752.16x = 28,642.52 × 12,688.63
  4. Step 4: Simplify right side
    20,752.16x = 363,434,298.66
  5. Step 5: Solve for x
    x = 363,434,298.66/20,752.16
  6. Step 6: Final answer
    x = 17,513.09

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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.