Home / 28,518.31-39,354.13-15,770.67

Finding the Fourth Proportional to 28,518.31, 39,354.13 and 15,770.67

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Solution

The fourth proportional to 28,518.31, 39,354.13 and 15,770.67 is: 21,762.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,518.31 : 39,354.13 = 15,770.67 : x
  2. Step 2: Convert to fraction form
    28,518.31/39,354.13 = 15,770.67/x
  3. Step 3: Cross multiply
    28,518.31x = 39,354.13 × 15,770.67
  4. Step 4: Simplify right side
    28,518.31x = 620,640,869.50
  5. Step 5: Solve for x
    x = 620,640,869.50/28,518.31
  6. Step 6: Final answer
    x = 21,762.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.