Home / 20,931.93-28,857.20-16,697.35

Finding the Fourth Proportional to 20,931.93, 28,857.20 and 16,697.35

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Solution

The fourth proportional to 20,931.93, 28,857.20 and 16,697.35 is: 23,019.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.93 : 28,857.20 = 16,697.35 : x
  2. Step 2: Convert to fraction form
    20,931.93/28,857.20 = 16,697.35/x
  3. Step 3: Cross multiply
    20,931.93x = 28,857.20 × 16,697.35
  4. Step 4: Simplify right side
    20,931.93x = 481,838,721.00
  5. Step 5: Solve for x
    x = 481,838,721.00/20,931.93
  6. Step 6: Final answer
    x = 23,019.32

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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.