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Finding the Fourth Proportional to 9,590.40, 13,128.48 and 9,292.32

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Solution

The fourth proportional to 9,590.40, 13,128.48 and 9,292.32 is: 12,720.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,590.40 : 13,128.48 = 9,292.32 : x
  2. Step 2: Convert to fraction form
    9,590.40/13,128.48 = 9,292.32/x
  3. Step 3: Cross multiply
    9,590.40x = 13,128.48 × 9,292.32
  4. Step 4: Simplify right side
    9,590.40x = 121,994,037.27
  5. Step 5: Solve for x
    x = 121,994,037.27/9,590.40
  6. Step 6: Final answer
    x = 12,720.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.