Home / 45,138.18-67,667.10-21,431.10

Finding the Fourth Proportional to 45,138.18, 67,667.10 and 21,431.10

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Solution

The fourth proportional to 45,138.18, 67,667.10 and 21,431.10 is: 32,127.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,138.18 : 67,667.10 = 21,431.10 : x
  2. Step 2: Convert to fraction form
    45,138.18/67,667.10 = 21,431.10/x
  3. Step 3: Cross multiply
    45,138.18x = 67,667.10 × 21,431.10
  4. Step 4: Simplify right side
    45,138.18x = 1,450,180,386.81
  5. Step 5: Solve for x
    x = 1,450,180,386.81/45,138.18
  6. Step 6: Final answer
    x = 32,127.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.