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Finding the Fourth Proportional to 40,386.79, 60,589.95 and 12,684.79

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Solution

The fourth proportional to 40,386.79, 60,589.95 and 12,684.79 is: 19,030.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,386.79 : 60,589.95 = 12,684.79 : x
  2. Step 2: Convert to fraction form
    40,386.79/60,589.95 = 12,684.79/x
  3. Step 3: Cross multiply
    40,386.79x = 60,589.95 × 12,684.79
  4. Step 4: Simplify right side
    40,386.79x = 768,570,791.86
  5. Step 5: Solve for x
    x = 768,570,791.86/40,386.79
  6. Step 6: Final answer
    x = 19,030.25

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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.