Home / 21,751.40-30,015.96-12,319.76

Finding the Fourth Proportional to 21,751.40, 30,015.96 and 12,319.76

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Solution

The fourth proportional to 21,751.40, 30,015.96 and 12,319.76 is: 17,000.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,751.40 : 30,015.96 = 12,319.76 : x
  2. Step 2: Convert to fraction form
    21,751.40/30,015.96 = 12,319.76/x
  3. Step 3: Cross multiply
    21,751.40x = 30,015.96 × 12,319.76
  4. Step 4: Simplify right side
    21,751.40x = 369,789,423.37
  5. Step 5: Solve for x
    x = 369,789,423.37/21,751.40
  6. Step 6: Final answer
    x = 17,000.72

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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.