Home / 13,855.90-19,116.40-7,886.08

Finding the Fourth Proportional to 13,855.90, 19,116.40 and 7,886.08

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Solution

The fourth proportional to 13,855.90, 19,116.40 and 7,886.08 is: 10,880.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,855.90 : 19,116.40 = 7,886.08 : x
  2. Step 2: Convert to fraction form
    13,855.90/19,116.40 = 7,886.08/x
  3. Step 3: Cross multiply
    13,855.90x = 19,116.40 × 7,886.08
  4. Step 4: Simplify right side
    13,855.90x = 150,753,364.13
  5. Step 5: Solve for x
    x = 150,753,364.13/13,855.90
  6. Step 6: Final answer
    x = 10,880.08

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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.