Home / 20,915.29-31,345.23-9,802.09

Finding the Fourth Proportional to 20,915.29, 31,345.23 and 9,802.09

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Solution

The fourth proportional to 20,915.29, 31,345.23 and 9,802.09 is: 14,690.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.29 : 31,345.23 = 9,802.09 : x
  2. Step 2: Convert to fraction form
    20,915.29/31,345.23 = 9,802.09/x
  3. Step 3: Cross multiply
    20,915.29x = 31,345.23 × 9,802.09
  4. Step 4: Simplify right side
    20,915.29x = 307,248,765.53
  5. Step 5: Solve for x
    x = 307,248,765.53/20,915.29
  6. Step 6: Final answer
    x = 14,690.15

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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.