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Finding the Fourth Proportional to 26,615.45, 39,938.67 and 9,987.10

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Solution

The fourth proportional to 26,615.45, 39,938.67 and 9,987.10 is: 14,986.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,615.45 : 39,938.67 = 9,987.10 : x
  2. Step 2: Convert to fraction form
    26,615.45/39,938.67 = 9,987.10/x
  3. Step 3: Cross multiply
    26,615.45x = 39,938.67 × 9,987.10
  4. Step 4: Simplify right side
    26,615.45x = 398,871,391.31
  5. Step 5: Solve for x
    x = 398,871,391.31/26,615.45
  6. Step 6: Final answer
    x = 14,986.46

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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.