Home / 31,590.20-47,385.08-12,865.84

Finding the Fourth Proportional to 31,590.20, 47,385.08 and 12,865.84

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Solution

The fourth proportional to 31,590.20, 47,385.08 and 12,865.84 is: 19,298.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,590.20 : 47,385.08 = 12,865.84 : x
  2. Step 2: Convert to fraction form
    31,590.20/47,385.08 = 12,865.84/x
  3. Step 3: Cross multiply
    31,590.20x = 47,385.08 × 12,865.84
  4. Step 4: Simplify right side
    31,590.20x = 609,648,857.67
  5. Step 5: Solve for x
    x = 609,648,857.67/31,590.20
  6. Step 6: Final answer
    x = 19,298.67

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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.