Home / 31,557.60-47,278.80-19,231.20

Finding the Fourth Proportional to 31,557.60, 47,278.80 and 19,231.20

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Solution

The fourth proportional to 31,557.60, 47,278.80 and 19,231.20 is: 28,811.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,557.60 : 47,278.80 = 19,231.20 : x
  2. Step 2: Convert to fraction form
    31,557.60/47,278.80 = 19,231.20/x
  3. Step 3: Cross multiply
    31,557.60x = 47,278.80 × 19,231.20
  4. Step 4: Simplify right side
    31,557.60x = 909,228,058.56
  5. Step 5: Solve for x
    x = 909,228,058.56/31,557.60
  6. Step 6: Final answer
    x = 28,811.70

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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.