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Finding the Fourth Proportional to 21,977.34, 30,330.90 and 12,547.32

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Solution

The fourth proportional to 21,977.34, 30,330.90 and 12,547.32 is: 17,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977.34 : 30,330.90 = 12,547.32 : x
  2. Step 2: Convert to fraction form
    21,977.34/30,330.90 = 12,547.32/x
  3. Step 3: Cross multiply
    21,977.34x = 30,330.90 × 12,547.32
  4. Step 4: Simplify right side
    21,977.34x = 380,571,508.19
  5. Step 5: Solve for x
    x = 380,571,508.19/21,977.34
  6. Step 6: Final answer
    x = 17,316.54

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