Home / 45,386.92-68,019.90-20,421.64

Finding the Fourth Proportional to 45,386.92, 68,019.90 and 20,421.64

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Solution

The fourth proportional to 45,386.92, 68,019.90 and 20,421.64 is: 30,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,386.92 : 68,019.90 = 20,421.64 : x
  2. Step 2: Convert to fraction form
    45,386.92/68,019.90 = 20,421.64/x
  3. Step 3: Cross multiply
    45,386.92x = 68,019.90 × 20,421.64
  4. Step 4: Simplify right side
    45,386.92x = 1,389,077,910.64
  5. Step 5: Solve for x
    x = 1,389,077,910.64/45,386.92
  6. Step 6: Final answer
    x = 30,605.25

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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.