Home / 15,387.83-21,235.33-9,012.99

Finding the Fourth Proportional to 15,387.83, 21,235.33 and 9,012.99

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Solution

The fourth proportional to 15,387.83, 21,235.33 and 9,012.99 is: 12,438.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.83 : 21,235.33 = 9,012.99 : x
  2. Step 2: Convert to fraction form
    15,387.83/21,235.33 = 9,012.99/x
  3. Step 3: Cross multiply
    15,387.83x = 21,235.33 × 9,012.99
  4. Step 4: Simplify right side
    15,387.83x = 191,393,816.94
  5. Step 5: Solve for x
    x = 191,393,816.94/15,387.83
  6. Step 6: Final answer
    x = 12,438.00

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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.