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Finding the Fourth Proportional to 28,298.40, 42,447.60 and 11,652.90

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Solution

The fourth proportional to 28,298.40, 42,447.60 and 11,652.90 is: 17,479.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,298.40 : 42,447.60 = 11,652.90 : x
  2. Step 2: Convert to fraction form
    28,298.40/42,447.60 = 11,652.90/x
  3. Step 3: Cross multiply
    28,298.40x = 42,447.60 × 11,652.90
  4. Step 4: Simplify right side
    28,298.40x = 494,637,638.04
  5. Step 5: Solve for x
    x = 494,637,638.04/28,298.40
  6. Step 6: Final answer
    x = 17,479.35

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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.