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Finding the Fourth Proportional to 39,907.70, 59,869.65 and 13,615.10

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Solution

The fourth proportional to 39,907.70, 59,869.65 and 13,615.10 is: 20,425.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,907.70 : 59,869.65 = 13,615.10 : x
  2. Step 2: Convert to fraction form
    39,907.70/59,869.65 = 13,615.10/x
  3. Step 3: Cross multiply
    39,907.70x = 59,869.65 × 13,615.10
  4. Step 4: Simplify right side
    39,907.70x = 815,131,271.72
  5. Step 5: Solve for x
    x = 815,131,271.72/39,907.70
  6. Step 6: Final answer
    x = 20,425.41

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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.