Home / 39,889.92-55,047.80-21,985.68

Finding the Fourth Proportional to 39,889.92, 55,047.80 and 21,985.68

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Solution

The fourth proportional to 39,889.92, 55,047.80 and 21,985.68 is: 30,340.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,889.92 : 55,047.80 = 21,985.68 : x
  2. Step 2: Convert to fraction form
    39,889.92/55,047.80 = 21,985.68/x
  3. Step 3: Cross multiply
    39,889.92x = 55,047.80 × 21,985.68
  4. Step 4: Simplify right side
    39,889.92x = 1,210,263,315.50
  5. Step 5: Solve for x
    x = 1,210,263,315.50/39,889.92
  6. Step 6: Final answer
    x = 30,340.08

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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.