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Finding the Fourth Proportional to 31,598.44, 47,424.95 and 12,888.79

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Solution

The fourth proportional to 31,598.44, 47,424.95 and 12,888.79 is: 19,344.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,598.44 : 47,424.95 = 12,888.79 : x
  2. Step 2: Convert to fraction form
    31,598.44/47,424.95 = 12,888.79/x
  3. Step 3: Cross multiply
    31,598.44x = 47,424.95 × 12,888.79
  4. Step 4: Simplify right side
    31,598.44x = 611,250,221.31
  5. Step 5: Solve for x
    x = 611,250,221.31/31,598.44
  6. Step 6: Final answer
    x = 19,344.32

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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.