Home / 21,007.20-31,525.20-9,328.80

Finding the Fourth Proportional to 21,007.20, 31,525.20 and 9,328.80

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Solution

The fourth proportional to 21,007.20, 31,525.20 and 9,328.80 is: 13,999.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.20 : 31,525.20 = 9,328.80 : x
  2. Step 2: Convert to fraction form
    21,007.20/31,525.20 = 9,328.80/x
  3. Step 3: Cross multiply
    21,007.20x = 31,525.20 × 9,328.80
  4. Step 4: Simplify right side
    21,007.20x = 294,092,285.76
  5. Step 5: Solve for x
    x = 294,092,285.76/21,007.20
  6. Step 6: Final answer
    x = 13,999.59

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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.