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Finding the Fourth Proportional to 12,347.64, 18,521.43 and 3,113.64

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Solution

The fourth proportional to 12,347.64, 18,521.43 and 3,113.64 is: 4,670.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,347.64 : 18,521.43 = 3,113.64 : x
  2. Step 2: Convert to fraction form
    12,347.64/18,521.43 = 3,113.64/x
  3. Step 3: Cross multiply
    12,347.64x = 18,521.43 × 3,113.64
  4. Step 4: Simplify right side
    12,347.64x = 57,669,065.31
  5. Step 5: Solve for x
    x = 57,669,065.31/12,347.64
  6. Step 6: Final answer
    x = 4,670.45

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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.