Home / 31,518.95-43,513.94-20,923.07

Finding the Fourth Proportional to 31,518.95, 43,513.94 and 20,923.07

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Solution

The fourth proportional to 31,518.95, 43,513.94 and 20,923.07 is: 28,885.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,518.95 : 43,513.94 = 20,923.07 : x
  2. Step 2: Convert to fraction form
    31,518.95/43,513.94 = 20,923.07/x
  3. Step 3: Cross multiply
    31,518.95x = 43,513.94 × 20,923.07
  4. Step 4: Simplify right side
    31,518.95x = 910,445,047.33
  5. Step 5: Solve for x
    x = 910,445,047.33/31,518.95
  6. Step 6: Final answer
    x = 28,885.64

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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.