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Finding the Fourth Proportional to 14,188.13, 19,580.06 and 7,815.18

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Solution

The fourth proportional to 14,188.13, 19,580.06 and 7,815.18 is: 10,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,188.13 : 19,580.06 = 7,815.18 : x
  2. Step 2: Convert to fraction form
    14,188.13/19,580.06 = 7,815.18/x
  3. Step 3: Cross multiply
    14,188.13x = 19,580.06 × 7,815.18
  4. Step 4: Simplify right side
    14,188.13x = 153,021,712.85
  5. Step 5: Solve for x
    x = 153,021,712.85/14,188.13
  6. Step 6: Final answer
    x = 10,785.20

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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.