Home / 12,781.04-17,640.45-7,477.16

Finding the Fourth Proportional to 12,781.04, 17,640.45 and 7,477.16

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Solution

The fourth proportional to 12,781.04, 17,640.45 and 7,477.16 is: 10,320.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,781.04 : 17,640.45 = 7,477.16 : x
  2. Step 2: Convert to fraction form
    12,781.04/17,640.45 = 7,477.16/x
  3. Step 3: Cross multiply
    12,781.04x = 17,640.45 × 7,477.16
  4. Step 4: Simplify right side
    12,781.04x = 131,900,378.92
  5. Step 5: Solve for x
    x = 131,900,378.92/12,781.04
  6. Step 6: Final answer
    x = 10,320.01

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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.