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Finding the Fourth Proportional to 39,038.80, 58,519.80 and 19,320.40

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Solution

The fourth proportional to 39,038.80, 58,519.80 and 19,320.40 is: 28,961.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,038.80 : 58,519.80 = 19,320.40 : x
  2. Step 2: Convert to fraction form
    39,038.80/58,519.80 = 19,320.40/x
  3. Step 3: Cross multiply
    39,038.80x = 58,519.80 × 19,320.40
  4. Step 4: Simplify right side
    39,038.80x = 1,130,625,943.92
  5. Step 5: Solve for x
    x = 1,130,625,943.92/39,038.80
  6. Step 6: Final answer
    x = 28,961.60

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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.