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Finding the Fourth Proportional to 15,621, 21,559.54 and 9,000.84

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Solution

The fourth proportional to 15,621, 21,559.54 and 9,000.84 is: 12,422.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,621 : 21,559.54 = 9,000.84 : x
  2. Step 2: Convert to fraction form
    15,621/21,559.54 = 9,000.84/x
  3. Step 3: Cross multiply
    15,621x = 21,559.54 × 9,000.84
  4. Step 4: Simplify right side
    15,621x = 194,053,970.01
  5. Step 5: Solve for x
    x = 194,053,970.01/15,621
  6. Step 6: Final answer
    x = 12,422.63

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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.