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Finding the Fourth Proportional to 21,990.76, 32,992.29 and 7,210.08

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Solution

The fourth proportional to 21,990.76, 32,992.29 and 7,210.08 is: 10,817.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.76 : 32,992.29 = 7,210.08 : x
  2. Step 2: Convert to fraction form
    21,990.76/32,992.29 = 7,210.08/x
  3. Step 3: Cross multiply
    21,990.76x = 32,992.29 × 7,210.08
  4. Step 4: Simplify right side
    21,990.76x = 237,877,050.28
  5. Step 5: Solve for x
    x = 237,877,050.28/21,990.76
  6. Step 6: Final answer
    x = 10,817.14

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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.