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Finding the Fourth Proportional to 21,916.94, 32,854.59 and 7,115.49

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Solution

The fourth proportional to 21,916.94, 32,854.59 and 7,115.49 is: 10,666.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.94 : 32,854.59 = 7,115.49 : x
  2. Step 2: Convert to fraction form
    21,916.94/32,854.59 = 7,115.49/x
  3. Step 3: Cross multiply
    21,916.94x = 32,854.59 × 7,115.49
  4. Step 4: Simplify right side
    21,916.94x = 233,776,506.60
  5. Step 5: Solve for x
    x = 233,776,506.60/21,916.94
  6. Step 6: Final answer
    x = 10,666.48

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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.