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Finding the Fourth Proportional to 14,145.16, 19,520.64 and 7,857.88

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Solution

The fourth proportional to 14,145.16, 19,520.64 and 7,857.88 is: 10,844.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,145.16 : 19,520.64 = 7,857.88 : x
  2. Step 2: Convert to fraction form
    14,145.16/19,520.64 = 7,857.88/x
  3. Step 3: Cross multiply
    14,145.16x = 19,520.64 × 7,857.88
  4. Step 4: Simplify right side
    14,145.16x = 153,390,846.64
  5. Step 5: Solve for x
    x = 153,390,846.64/14,145.16
  6. Step 6: Final answer
    x = 10,844.05

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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.