Home / 31,488.78-47,219.80-12,772.92

Finding the Fourth Proportional to 31,488.78, 47,219.80 and 12,772.92

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Solution

The fourth proportional to 31,488.78, 47,219.80 and 12,772.92 is: 19,153.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,488.78 : 47,219.80 = 12,772.92 : x
  2. Step 2: Convert to fraction form
    31,488.78/47,219.80 = 12,772.92/x
  3. Step 3: Cross multiply
    31,488.78x = 47,219.80 × 12,772.92
  4. Step 4: Simplify right side
    31,488.78x = 603,134,727.82
  5. Step 5: Solve for x
    x = 603,134,727.82/31,488.78
  6. Step 6: Final answer
    x = 19,153.96

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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.