Home / 13,856.40-19,117.09-7,886.58

Finding the Fourth Proportional to 13,856.40, 19,117.09 and 7,886.58

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Solution

The fourth proportional to 13,856.40, 19,117.09 and 7,886.58 is: 10,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.40 : 19,117.09 = 7,886.58 : x
  2. Step 2: Convert to fraction form
    13,856.40/19,117.09 = 7,886.58/x
  3. Step 3: Cross multiply
    13,856.40x = 19,117.09 × 7,886.58
  4. Step 4: Simplify right side
    13,856.40x = 150,768,459.65
  5. Step 5: Solve for x
    x = 150,768,459.65/13,856.40
  6. Step 6: Final answer
    x = 10,880.78

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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.