Home / 10,856.40-14,979.24-6,140.40

Finding the Fourth Proportional to 10,856.40, 14,979.24 and 6,140.40

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Solution

The fourth proportional to 10,856.40, 14,979.24 and 6,140.40 is: 8,472.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,856.40 : 14,979.24 = 6,140.40 : x
  2. Step 2: Convert to fraction form
    10,856.40/14,979.24 = 6,140.40/x
  3. Step 3: Cross multiply
    10,856.40x = 14,979.24 × 6,140.40
  4. Step 4: Simplify right side
    10,856.40x = 91,978,525.30
  5. Step 5: Solve for x
    x = 91,978,525.30/10,856.40
  6. Step 6: Final answer
    x = 8,472.29

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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.