Home / 21,218.55-31,827.01-7,179.63

Finding the Fourth Proportional to 21,218.55, 31,827.01 and 7,179.63

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Solution

The fourth proportional to 21,218.55, 31,827.01 and 7,179.63 is: 10,769.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.55 : 31,827.01 = 7,179.63 : x
  2. Step 2: Convert to fraction form
    21,218.55/31,827.01 = 7,179.63/x
  3. Step 3: Cross multiply
    21,218.55x = 31,827.01 × 7,179.63
  4. Step 4: Simplify right side
    21,218.55x = 228,506,155.81
  5. Step 5: Solve for x
    x = 228,506,155.81/21,218.55
  6. Step 6: Final answer
    x = 10,769.17

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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.