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Finding the Fourth Proportional to 15,270, 21,068.52 and 9,218.76

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Solution

The fourth proportional to 15,270, 21,068.52 and 9,218.76 is: 12,719.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,270 : 21,068.52 = 9,218.76 : x
  2. Step 2: Convert to fraction form
    15,270/21,068.52 = 9,218.76/x
  3. Step 3: Cross multiply
    15,270x = 21,068.52 × 9,218.76
  4. Step 4: Simplify right side
    15,270x = 194,225,629.44
  5. Step 5: Solve for x
    x = 194,225,629.44/15,270
  6. Step 6: Final answer
    x = 12,719.43

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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.