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Finding the Fourth Proportional to 15,047.19, 20,775.21 and 9,384.23

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Solution

The fourth proportional to 15,047.19, 20,775.21 and 9,384.23 is: 12,956.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.19 : 20,775.21 = 9,384.23 : x
  2. Step 2: Convert to fraction form
    15,047.19/20,775.21 = 9,384.23/x
  3. Step 3: Cross multiply
    15,047.19x = 20,775.21 × 9,384.23
  4. Step 4: Simplify right side
    15,047.19x = 194,959,400.88
  5. Step 5: Solve for x
    x = 194,959,400.88/15,047.19
  6. Step 6: Final answer
    x = 12,956.53

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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.