Home / 21,750.39-30,015.50-12,319.83

Finding the Fourth Proportional to 21,750.39, 30,015.50 and 12,319.83

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Solution

The fourth proportional to 21,750.39, 30,015.50 and 12,319.83 is: 17,001.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.39 : 30,015.50 = 12,319.83 : x
  2. Step 2: Convert to fraction form
    21,750.39/30,015.50 = 12,319.83/x
  3. Step 3: Cross multiply
    21,750.39x = 30,015.50 × 12,319.83
  4. Step 4: Simplify right side
    21,750.39x = 369,785,795.77
  5. Step 5: Solve for x
    x = 369,785,795.77/21,750.39
  6. Step 6: Final answer
    x = 17,001.34

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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.