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Finding the Fourth Proportional to 28,401, 39,178.47 and 21,674.91

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Solution

The fourth proportional to 28,401, 39,178.47 and 21,674.91 is: 29,900.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401 : 39,178.47 = 21,674.91 : x
  2. Step 2: Convert to fraction form
    28,401/39,178.47 = 21,674.91/x
  3. Step 3: Cross multiply
    28,401x = 39,178.47 × 21,674.91
  4. Step 4: Simplify right side
    28,401x = 849,189,811.19
  5. Step 5: Solve for x
    x = 849,189,811.19/28,401
  6. Step 6: Final answer
    x = 29,900.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.