Home / 21,210.02-31,765.80-20,471.93

Finding the Fourth Proportional to 21,210.02, 31,765.80 and 20,471.93

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Solution

The fourth proportional to 21,210.02, 31,765.80 and 20,471.93 is: 30,660.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.02 : 31,765.80 = 20,471.93 : x
  2. Step 2: Convert to fraction form
    21,210.02/31,765.80 = 20,471.93/x
  3. Step 3: Cross multiply
    21,210.02x = 31,765.80 × 20,471.93
  4. Step 4: Simplify right side
    21,210.02x = 650,307,233.99
  5. Step 5: Solve for x
    x = 650,307,233.99/21,210.02
  6. Step 6: Final answer
    x = 30,660.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.