Home / 31,502.96-47,256.12-12,780.20

Finding the Fourth Proportional to 31,502.96, 47,256.12 and 12,780.20

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Solution

The fourth proportional to 31,502.96, 47,256.12 and 12,780.20 is: 19,170.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,502.96 : 47,256.12 = 12,780.20 : x
  2. Step 2: Convert to fraction form
    31,502.96/47,256.12 = 12,780.20/x
  3. Step 3: Cross multiply
    31,502.96x = 47,256.12 × 12,780.20
  4. Step 4: Simplify right side
    31,502.96x = 603,942,664.82
  5. Step 5: Solve for x
    x = 603,942,664.82/31,502.96
  6. Step 6: Final answer
    x = 19,170.98

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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.