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Finding the Fourth Proportional to 14,143.60, 19,518.60 and 7,856.92

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Solution

The fourth proportional to 14,143.60, 19,518.60 and 7,856.92 is: 10,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,143.60 : 19,518.60 = 7,856.92 : x
  2. Step 2: Convert to fraction form
    14,143.60/19,518.60 = 7,856.92/x
  3. Step 3: Cross multiply
    14,143.60x = 19,518.60 × 7,856.92
  4. Step 4: Simplify right side
    14,143.60x = 153,356,078.71
  5. Step 5: Solve for x
    x = 153,356,078.71/14,143.60
  6. Step 6: Final answer
    x = 10,842.79

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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.