Home / 31,136.93-42,980.04-18,390.16

Finding the Fourth Proportional to 31,136.93, 42,980.04 and 18,390.16

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Solution

The fourth proportional to 31,136.93, 42,980.04 and 18,390.16 is: 25,384.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,136.93 : 42,980.04 = 18,390.16 : x
  2. Step 2: Convert to fraction form
    31,136.93/42,980.04 = 18,390.16/x
  3. Step 3: Cross multiply
    31,136.93x = 42,980.04 × 18,390.16
  4. Step 4: Simplify right side
    31,136.93x = 790,409,704.96
  5. Step 5: Solve for x
    x = 790,409,704.96/31,136.93
  6. Step 6: Final answer
    x = 25,384.96

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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.