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Finding the Fourth Proportional to 39,365, 59,055.60 and 15,991.40

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Solution

The fourth proportional to 39,365, 59,055.60 and 15,991.40 is: 23,990.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,365 : 59,055.60 = 15,991.40 : x
  2. Step 2: Convert to fraction form
    39,365/59,055.60 = 15,991.40/x
  3. Step 3: Cross multiply
    39,365x = 59,055.60 × 15,991.40
  4. Step 4: Simplify right side
    39,365x = 944,381,721.84
  5. Step 5: Solve for x
    x = 944,381,721.84/39,365
  6. Step 6: Final answer
    x = 23,990.39

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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.