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Finding the Fourth Proportional to 42,608.64, 63,921.16 and 19,235.08

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Solution

The fourth proportional to 42,608.64, 63,921.16 and 19,235.08 is: 28,856.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,608.64 : 63,921.16 = 19,235.08 : x
  2. Step 2: Convert to fraction form
    42,608.64/63,921.16 = 19,235.08/x
  3. Step 3: Cross multiply
    42,608.64x = 63,921.16 × 19,235.08
  4. Step 4: Simplify right side
    42,608.64x = 1,229,528,626.29
  5. Step 5: Solve for x
    x = 1,229,528,626.29/42,608.64
  6. Step 6: Final answer
    x = 28,856.32

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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.