Home / 20,951.02-31,421.67-7,809.58

Finding the Fourth Proportional to 20,951.02, 31,421.67 and 7,809.58

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Solution

The fourth proportional to 20,951.02, 31,421.67 and 7,809.58 is: 11,712.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.02 : 31,421.67 = 7,809.58 : x
  2. Step 2: Convert to fraction form
    20,951.02/31,421.67 = 7,809.58/x
  3. Step 3: Cross multiply
    20,951.02x = 31,421.67 × 7,809.58
  4. Step 4: Simplify right side
    20,951.02x = 245,390,045.60
  5. Step 5: Solve for x
    x = 245,390,045.60/20,951.02
  6. Step 6: Final answer
    x = 11,712.56

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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.