Home / 20,835.36-28,752.96-12,875.76

Finding the Fourth Proportional to 20,835.36, 28,752.96 and 12,875.76

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Solution

The fourth proportional to 20,835.36, 28,752.96 and 12,875.76 is: 17,768.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,835.36 : 28,752.96 = 12,875.76 : x
  2. Step 2: Convert to fraction form
    20,835.36/28,752.96 = 12,875.76/x
  3. Step 3: Cross multiply
    20,835.36x = 28,752.96 × 12,875.76
  4. Step 4: Simplify right side
    20,835.36x = 370,216,212.25
  5. Step 5: Solve for x
    x = 370,216,212.25/20,835.36
  6. Step 6: Final answer
    x = 17,768.65

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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.