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Finding the Fourth Proportional to 14,012.90, 19,337.43 and 7,639.65

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Solution

The fourth proportional to 14,012.90, 19,337.43 and 7,639.65 is: 10,542.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,012.90 : 19,337.43 = 7,639.65 : x
  2. Step 2: Convert to fraction form
    14,012.90/19,337.43 = 7,639.65/x
  3. Step 3: Cross multiply
    14,012.90x = 19,337.43 × 7,639.65
  4. Step 4: Simplify right side
    14,012.90x = 147,731,225.75
  5. Step 5: Solve for x
    x = 147,731,225.75/14,012.90
  6. Step 6: Final answer
    x = 10,542.52

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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.