Home / 31,985.60-47,956.80-16,390.40

Finding the Fourth Proportional to 31,985.60, 47,956.80 and 16,390.40

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Solution

The fourth proportional to 31,985.60, 47,956.80 and 16,390.40 is: 24,574.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,985.60 : 47,956.80 = 16,390.40 : x
  2. Step 2: Convert to fraction form
    31,985.60/47,956.80 = 16,390.40/x
  3. Step 3: Cross multiply
    31,985.60x = 47,956.80 × 16,390.40
  4. Step 4: Simplify right side
    31,985.60x = 786,031,134.72
  5. Step 5: Solve for x
    x = 786,031,134.72/31,985.60
  6. Step 6: Final answer
    x = 24,574.53

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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.