Home / 12,543.93-18,706.28-10,991.16

Finding the Fourth Proportional to 12,543.93, 18,706.28 and 10,991.16

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Solution

The fourth proportional to 12,543.93, 18,706.28 and 10,991.16 is: 16,390.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,543.93 : 18,706.28 = 10,991.16 : x
  2. Step 2: Convert to fraction form
    12,543.93/18,706.28 = 10,991.16/x
  3. Step 3: Cross multiply
    12,543.93x = 18,706.28 × 10,991.16
  4. Step 4: Simplify right side
    12,543.93x = 205,603,661.53
  5. Step 5: Solve for x
    x = 205,603,661.53/12,543.93
  6. Step 6: Final answer
    x = 16,390.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.