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Finding the Fourth Proportional to 28,428.84, 42,643.62 and 7,652.34

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Solution

The fourth proportional to 28,428.84, 42,643.62 and 7,652.34 is: 11,478.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,428.84 : 42,643.62 = 7,652.34 : x
  2. Step 2: Convert to fraction form
    28,428.84/42,643.62 = 7,652.34/x
  3. Step 3: Cross multiply
    28,428.84x = 42,643.62 × 7,652.34
  4. Step 4: Simplify right side
    28,428.84x = 326,323,479.07
  5. Step 5: Solve for x
    x = 326,323,479.07/28,428.84
  6. Step 6: Final answer
    x = 11,478.61

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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.