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Finding the Fourth Proportional to 19,312.38, 26,649 and 12,140.64

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Solution

The fourth proportional to 19,312.38, 26,649 and 12,140.64 is: 16,752.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,312.38 : 26,649 = 12,140.64 : x
  2. Step 2: Convert to fraction form
    19,312.38/26,649 = 12,140.64/x
  3. Step 3: Cross multiply
    19,312.38x = 26,649 × 12,140.64
  4. Step 4: Simplify right side
    19,312.38x = 323,535,915.36
  5. Step 5: Solve for x
    x = 323,535,915.36/19,312.38
  6. Step 6: Final answer
    x = 16,752.77

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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.