Home / 39,636.80-59,455.20-20,909.60

Finding the Fourth Proportional to 39,636.80, 59,455.20 and 20,909.60

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Solution

The fourth proportional to 39,636.80, 59,455.20 and 20,909.60 is: 31,364.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,636.80 : 59,455.20 = 20,909.60 : x
  2. Step 2: Convert to fraction form
    39,636.80/59,455.20 = 20,909.60/x
  3. Step 3: Cross multiply
    39,636.80x = 59,455.20 × 20,909.60
  4. Step 4: Simplify right side
    39,636.80x = 1,243,184,449.92
  5. Step 5: Solve for x
    x = 1,243,184,449.92/39,636.80
  6. Step 6: Final answer
    x = 31,364.40

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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.