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Finding the Fourth Proportional to 13,987.94, 19,305.95 and 8,019.65

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Solution

The fourth proportional to 13,987.94, 19,305.95 and 8,019.65 is: 11,068.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.94 : 19,305.95 = 8,019.65 : x
  2. Step 2: Convert to fraction form
    13,987.94/19,305.95 = 8,019.65/x
  3. Step 3: Cross multiply
    13,987.94x = 19,305.95 × 8,019.65
  4. Step 4: Simplify right side
    13,987.94x = 154,826,921.82
  5. Step 5: Solve for x
    x = 154,826,921.82/13,987.94
  6. Step 6: Final answer
    x = 11,068.60

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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.