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Finding the Fourth Proportional to 19,978.20, 27,570.15 and 11,026.08

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Solution

The fourth proportional to 19,978.20, 27,570.15 and 11,026.08 is: 15,216.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.20 : 27,570.15 = 11,026.08 : x
  2. Step 2: Convert to fraction form
    19,978.20/27,570.15 = 11,026.08/x
  3. Step 3: Cross multiply
    19,978.20x = 27,570.15 × 11,026.08
  4. Step 4: Simplify right side
    19,978.20x = 303,990,679.51
  5. Step 5: Solve for x
    x = 303,990,679.51/19,978.20
  6. Step 6: Final answer
    x = 15,216.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.