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Finding the Fourth Proportional to 39,038.40, 58,490.40 and 18,219.20

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Solution

The fourth proportional to 39,038.40, 58,490.40 and 18,219.20 is: 27,297.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,038.40 : 58,490.40 = 18,219.20 : x
  2. Step 2: Convert to fraction form
    39,038.40/58,490.40 = 18,219.20/x
  3. Step 3: Cross multiply
    39,038.40x = 58,490.40 × 18,219.20
  4. Step 4: Simplify right side
    39,038.40x = 1,065,648,295.68
  5. Step 5: Solve for x
    x = 1,065,648,295.68/39,038.40
  6. Step 6: Final answer
    x = 27,297.44

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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.