Home / 21,000.45-31,492.44-9,305.47

Finding the Fourth Proportional to 21,000.45, 31,492.44 and 9,305.47

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Solution

The fourth proportional to 21,000.45, 31,492.44 and 9,305.47 is: 13,954.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.45 : 31,492.44 = 9,305.47 : x
  2. Step 2: Convert to fraction form
    21,000.45/31,492.44 = 9,305.47/x
  3. Step 3: Cross multiply
    21,000.45x = 31,492.44 × 9,305.47
  4. Step 4: Simplify right side
    21,000.45x = 293,051,955.65
  5. Step 5: Solve for x
    x = 293,051,955.65/21,000.45
  6. Step 6: Final answer
    x = 13,954.56

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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.