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Finding the Fourth Proportional to 11,230.60, 15,460.32 and 9,918.40

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Solution

The fourth proportional to 11,230.60, 15,460.32 and 9,918.40 is: 13,653.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,230.60 : 15,460.32 = 9,918.40 : x
  2. Step 2: Convert to fraction form
    11,230.60/15,460.32 = 9,918.40/x
  3. Step 3: Cross multiply
    11,230.60x = 15,460.32 × 9,918.40
  4. Step 4: Simplify right side
    11,230.60x = 153,341,637.89
  5. Step 5: Solve for x
    x = 153,341,637.89/11,230.60
  6. Step 6: Final answer
    x = 13,653.91

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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.