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Finding the Fourth Proportional to 10,879.16, 15,011.08 and 6,403.12

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Solution

The fourth proportional to 10,879.16, 15,011.08 and 6,403.12 is: 8,835.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.16 : 15,011.08 = 6,403.12 : x
  2. Step 2: Convert to fraction form
    10,879.16/15,011.08 = 6,403.12/x
  3. Step 3: Cross multiply
    10,879.16x = 15,011.08 × 6,403.12
  4. Step 4: Simplify right side
    10,879.16x = 96,117,746.57
  5. Step 5: Solve for x
    x = 96,117,746.57/10,879.16
  6. Step 6: Final answer
    x = 8,835.03

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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.