Home / 28,128.40-38,818.20-16,802.80

Finding the Fourth Proportional to 28,128.40, 38,818.20 and 16,802.80

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Solution

The fourth proportional to 28,128.40, 38,818.20 and 16,802.80 is: 23,188.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.40 : 38,818.20 = 16,802.80 : x
  2. Step 2: Convert to fraction form
    28,128.40/38,818.20 = 16,802.80/x
  3. Step 3: Cross multiply
    28,128.40x = 38,818.20 × 16,802.80
  4. Step 4: Simplify right side
    28,128.40x = 652,254,450.96
  5. Step 5: Solve for x
    x = 652,254,450.96/28,128.40
  6. Step 6: Final answer
    x = 23,188.47

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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.