Home / 21,749.70-30,014.56-12,320.08

Finding the Fourth Proportional to 21,749.70, 30,014.56 and 12,320.08

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Solution

The fourth proportional to 21,749.70, 30,014.56 and 12,320.08 is: 17,001.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.70 : 30,014.56 = 12,320.08 : x
  2. Step 2: Convert to fraction form
    21,749.70/30,014.56 = 12,320.08/x
  3. Step 3: Cross multiply
    21,749.70x = 30,014.56 × 12,320.08
  4. Step 4: Simplify right side
    21,749.70x = 369,781,780.36
  5. Step 5: Solve for x
    x = 369,781,780.36/21,749.70
  6. Step 6: Final answer
    x = 17,001.70

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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.