Home / 21,916.64-30,206.64-15,866.72

Finding the Fourth Proportional to 21,916.64, 30,206.64 and 15,866.72

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Solution

The fourth proportional to 21,916.64, 30,206.64 and 15,866.72 is: 21,868.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,916.64 : 30,206.64 = 15,866.72 : x
  2. Step 2: Convert to fraction form
    21,916.64/30,206.64 = 15,866.72/x
  3. Step 3: Cross multiply
    21,916.64x = 30,206.64 × 15,866.72
  4. Step 4: Simplify right side
    21,916.64x = 479,280,299.02
  5. Step 5: Solve for x
    x = 479,280,299.02/21,916.64
  6. Step 6: Final answer
    x = 21,868.33

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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.