Home / 42,316.32-63,396-21,231.60

Finding the Fourth Proportional to 42,316.32, 63,396 and 21,231.60

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Solution

The fourth proportional to 42,316.32, 63,396 and 21,231.60 is: 31,808.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,316.32 : 63,396 = 21,231.60 : x
  2. Step 2: Convert to fraction form
    42,316.32/63,396 = 21,231.60/x
  3. Step 3: Cross multiply
    42,316.32x = 63,396 × 21,231.60
  4. Step 4: Simplify right side
    42,316.32x = 1,345,998,513.60
  5. Step 5: Solve for x
    x = 1,345,998,513.60/42,316.32
  6. Step 6: Final answer
    x = 31,808.02

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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.