Home / 20,411.64-30,613.95-9,315.72

Finding the Fourth Proportional to 20,411.64, 30,613.95 and 9,315.72

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Solution

The fourth proportional to 20,411.64, 30,613.95 and 9,315.72 is: 13,971.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,411.64 : 30,613.95 = 9,315.72 : x
  2. Step 2: Convert to fraction form
    20,411.64/30,613.95 = 9,315.72/x
  3. Step 3: Cross multiply
    20,411.64x = 30,613.95 × 9,315.72
  4. Step 4: Simplify right side
    20,411.64x = 285,190,986.29
  5. Step 5: Solve for x
    x = 285,190,986.29/20,411.64
  6. Step 6: Final answer
    x = 13,971.98

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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.