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Finding the Fourth Proportional to 15,710.60, 21,678.19 and 9,334.82

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Solution

The fourth proportional to 15,710.60, 21,678.19 and 9,334.82 is: 12,880.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.60 : 21,678.19 = 9,334.82 : x
  2. Step 2: Convert to fraction form
    15,710.60/21,678.19 = 9,334.82/x
  3. Step 3: Cross multiply
    15,710.60x = 21,678.19 × 9,334.82
  4. Step 4: Simplify right side
    15,710.60x = 202,362,037.10
  5. Step 5: Solve for x
    x = 202,362,037.10/15,710.60
  6. Step 6: Final answer
    x = 12,880.61

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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.