Home / 20,730.48-31,071.36-9,613.78

Finding the Fourth Proportional to 20,730.48, 31,071.36 and 9,613.78

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Solution

The fourth proportional to 20,730.48, 31,071.36 and 9,613.78 is: 14,409.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.48 : 31,071.36 = 9,613.78 : x
  2. Step 2: Convert to fraction form
    20,730.48/31,071.36 = 9,613.78/x
  3. Step 3: Cross multiply
    20,730.48x = 31,071.36 × 9,613.78
  4. Step 4: Simplify right side
    20,730.48x = 298,713,219.34
  5. Step 5: Solve for x
    x = 298,713,219.34/20,730.48
  6. Step 6: Final answer
    x = 14,409.37

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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.