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Finding the Fourth Proportional to 14,578.94, 20,113.98 and 8,916.32

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Solution

The fourth proportional to 14,578.94, 20,113.98 and 8,916.32 is: 12,301.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,578.94 : 20,113.98 = 8,916.32 : x
  2. Step 2: Convert to fraction form
    14,578.94/20,113.98 = 8,916.32/x
  3. Step 3: Cross multiply
    14,578.94x = 20,113.98 × 8,916.32
  4. Step 4: Simplify right side
    14,578.94x = 179,342,682.15
  5. Step 5: Solve for x
    x = 179,342,682.15/14,578.94
  6. Step 6: Final answer
    x = 12,301.49

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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.