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Finding the Fourth Proportional to 12,574.80, 18,864.62 and 4,782.99

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Solution

The fourth proportional to 12,574.80, 18,864.62 and 4,782.99 is: 7,175.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,574.80 : 18,864.62 = 4,782.99 : x
  2. Step 2: Convert to fraction form
    12,574.80/18,864.62 = 4,782.99/x
  3. Step 3: Cross multiply
    12,574.80x = 18,864.62 × 4,782.99
  4. Step 4: Simplify right side
    12,574.80x = 90,229,264.90
  5. Step 5: Solve for x
    x = 90,229,264.90/12,574.80
  6. Step 6: Final answer
    x = 7,175.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.