Home / 21,750.39-30,015.03-12,675.17

Finding the Fourth Proportional to 21,750.39, 30,015.03 and 12,675.17

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Solution

The fourth proportional to 21,750.39, 30,015.03 and 12,675.17 is: 17,491.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.39 : 30,015.03 = 12,675.17 : x
  2. Step 2: Convert to fraction form
    21,750.39/30,015.03 = 12,675.17/x
  3. Step 3: Cross multiply
    21,750.39x = 30,015.03 × 12,675.17
  4. Step 4: Simplify right side
    21,750.39x = 380,445,607.81
  5. Step 5: Solve for x
    x = 380,445,607.81/21,750.39
  6. Step 6: Final answer
    x = 17,491.44

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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.