Home / 39,885.02-55,041.71-21,980.68

Finding the Fourth Proportional to 39,885.02, 55,041.71 and 21,980.68

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Solution

The fourth proportional to 39,885.02, 55,041.71 and 21,980.68 is: 30,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.02 : 55,041.71 = 21,980.68 : x
  2. Step 2: Convert to fraction form
    39,885.02/55,041.71 = 21,980.68/x
  3. Step 3: Cross multiply
    39,885.02x = 55,041.71 × 21,980.68
  4. Step 4: Simplify right side
    39,885.02x = 1,209,854,399.91
  5. Step 5: Solve for x
    x = 1,209,854,399.91/39,885.02
  6. Step 6: Final answer
    x = 30,333.55

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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.