Home / 20,384.64-28,121.28-12,827.52

Finding the Fourth Proportional to 20,384.64, 28,121.28 and 12,827.52

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Solution

The fourth proportional to 20,384.64, 28,121.28 and 12,827.52 is: 17,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.64 : 28,121.28 = 12,827.52 : x
  2. Step 2: Convert to fraction form
    20,384.64/28,121.28 = 12,827.52/x
  3. Step 3: Cross multiply
    20,384.64x = 28,121.28 × 12,827.52
  4. Step 4: Simplify right side
    20,384.64x = 360,726,281.63
  5. Step 5: Solve for x
    x = 360,726,281.63/20,384.64
  6. Step 6: Final answer
    x = 17,695.98

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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.