Home / 10,911.36-15,056.40-6,434.72

Finding the Fourth Proportional to 10,911.36, 15,056.40 and 6,434.72

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Solution

The fourth proportional to 10,911.36, 15,056.40 and 6,434.72 is: 8,879.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,911.36 : 15,056.40 = 6,434.72 : x
  2. Step 2: Convert to fraction form
    10,911.36/15,056.40 = 6,434.72/x
  3. Step 3: Cross multiply
    10,911.36x = 15,056.40 × 6,434.72
  4. Step 4: Simplify right side
    10,911.36x = 96,883,718.21
  5. Step 5: Solve for x
    x = 96,883,718.21/10,911.36
  6. Step 6: Final answer
    x = 8,879.16

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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.