Home / 20,605.12-28,433.18-11,653.40

Finding the Fourth Proportional to 20,605.12, 28,433.18 and 11,653.40

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Solution

The fourth proportional to 20,605.12, 28,433.18 and 11,653.40 is: 16,080.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.12 : 28,433.18 = 11,653.40 : x
  2. Step 2: Convert to fraction form
    20,605.12/28,433.18 = 11,653.40/x
  3. Step 3: Cross multiply
    20,605.12x = 28,433.18 × 11,653.40
  4. Step 4: Simplify right side
    20,605.12x = 331,343,219.81
  5. Step 5: Solve for x
    x = 331,343,219.81/20,605.12
  6. Step 6: Final answer
    x = 16,080.63

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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.