Home / 20,927.21-31,364.10-9,809.40

Finding the Fourth Proportional to 20,927.21, 31,364.10 and 9,809.40

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Solution

The fourth proportional to 20,927.21, 31,364.10 and 9,809.40 is: 14,701.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.21 : 31,364.10 = 9,809.40 : x
  2. Step 2: Convert to fraction form
    20,927.21/31,364.10 = 9,809.40/x
  3. Step 3: Cross multiply
    20,927.21x = 31,364.10 × 9,809.40
  4. Step 4: Simplify right side
    20,927.21x = 307,663,002.54
  5. Step 5: Solve for x
    x = 307,663,002.54/20,927.21
  6. Step 6: Final answer
    x = 14,701.58

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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.