Home / 31,438.72-47,157.81-12,718.54

Finding the Fourth Proportional to 31,438.72, 47,157.81 and 12,718.54

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Solution

The fourth proportional to 31,438.72, 47,157.81 and 12,718.54 is: 19,077.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.72 : 47,157.81 = 12,718.54 : x
  2. Step 2: Convert to fraction form
    31,438.72/47,157.81 = 12,718.54/x
  3. Step 3: Cross multiply
    31,438.72x = 47,157.81 × 12,718.54
  4. Step 4: Simplify right side
    31,438.72x = 599,778,492.80
  5. Step 5: Solve for x
    x = 599,778,492.80/31,438.72
  6. Step 6: Final answer
    x = 19,077.70

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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.