Home / 22,690.13-31,303.40-13,128.26

Finding the Fourth Proportional to 22,690.13, 31,303.40 and 13,128.26

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Solution

The fourth proportional to 22,690.13, 31,303.40 and 13,128.26 is: 18,111.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,690.13 : 31,303.40 = 13,128.26 : x
  2. Step 2: Convert to fraction form
    22,690.13/31,303.40 = 13,128.26/x
  3. Step 3: Cross multiply
    22,690.13x = 31,303.40 × 13,128.26
  4. Step 4: Simplify right side
    22,690.13x = 410,958,951.93
  5. Step 5: Solve for x
    x = 410,958,951.93/22,690.13
  6. Step 6: Final answer
    x = 18,111.80

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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.