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Finding the Fourth Proportional to 28,652.90, 39,539.02 and 15,905.08

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Solution

The fourth proportional to 28,652.90, 39,539.02 and 15,905.08 is: 21,947.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.90 : 39,539.02 = 15,905.08 : x
  2. Step 2: Convert to fraction form
    28,652.90/39,539.02 = 15,905.08/x
  3. Step 3: Cross multiply
    28,652.90x = 39,539.02 × 15,905.08
  4. Step 4: Simplify right side
    28,652.90x = 628,871,276.22
  5. Step 5: Solve for x
    x = 628,871,276.22/28,652.90
  6. Step 6: Final answer
    x = 21,947.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.