Home / 39,885.09-55,041.80-21,980.74

Finding the Fourth Proportional to 39,885.09, 55,041.80 and 21,980.74

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Solution

The fourth proportional to 39,885.09, 55,041.80 and 21,980.74 is: 30,333.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.09 : 55,041.80 = 21,980.74 : x
  2. Step 2: Convert to fraction form
    39,885.09/55,041.80 = 21,980.74/x
  3. Step 3: Cross multiply
    39,885.09x = 55,041.80 × 21,980.74
  4. Step 4: Simplify right side
    39,885.09x = 1,209,859,494.93
  5. Step 5: Solve for x
    x = 1,209,859,494.93/39,885.09
  6. Step 6: Final answer
    x = 30,333.63

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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.