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Finding the Fourth Proportional to 28,592.96, 42,888.08 and 7,816.40

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Solution

The fourth proportional to 28,592.96, 42,888.08 and 7,816.40 is: 11,724.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,592.96 : 42,888.08 = 7,816.40 : x
  2. Step 2: Convert to fraction form
    28,592.96/42,888.08 = 7,816.40/x
  3. Step 3: Cross multiply
    28,592.96x = 42,888.08 × 7,816.40
  4. Step 4: Simplify right side
    28,592.96x = 335,230,388.51
  5. Step 5: Solve for x
    x = 335,230,388.51/28,592.96
  6. Step 6: Final answer
    x = 11,724.23

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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.