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Finding the Fourth Proportional to 39,870.80, 59,784.60 and 16,470.80

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Solution

The fourth proportional to 39,870.80, 59,784.60 and 16,470.80 is: 24,697.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,870.80 : 59,784.60 = 16,470.80 : x
  2. Step 2: Convert to fraction form
    39,870.80/59,784.60 = 16,470.80/x
  3. Step 3: Cross multiply
    39,870.80x = 59,784.60 × 16,470.80
  4. Step 4: Simplify right side
    39,870.80x = 984,700,189.68
  5. Step 5: Solve for x
    x = 984,700,189.68/39,870.80
  6. Step 6: Final answer
    x = 24,697.28

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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.