Home / 28,613.48-39,485.90-15,866.72

Finding the Fourth Proportional to 28,613.48, 39,485.90 and 15,866.72

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Solution

The fourth proportional to 28,613.48, 39,485.90 and 15,866.72 is: 21,895.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.48 : 39,485.90 = 15,866.72 : x
  2. Step 2: Convert to fraction form
    28,613.48/39,485.90 = 15,866.72/x
  3. Step 3: Cross multiply
    28,613.48x = 39,485.90 × 15,866.72
  4. Step 4: Simplify right side
    28,613.48x = 626,511,442.48
  5. Step 5: Solve for x
    x = 626,511,442.48/28,613.48
  6. Step 6: Final answer
    x = 21,895.67

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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.