Home / 20,657.89-28,509.03-11,708.28

Finding the Fourth Proportional to 20,657.89, 28,509.03 and 11,708.28

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Solution

The fourth proportional to 20,657.89, 28,509.03 and 11,708.28 is: 16,158.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,657.89 : 28,509.03 = 11,708.28 : x
  2. Step 2: Convert to fraction form
    20,657.89/28,509.03 = 11,708.28/x
  3. Step 3: Cross multiply
    20,657.89x = 28,509.03 × 11,708.28
  4. Step 4: Simplify right side
    20,657.89x = 333,791,705.77
  5. Step 5: Solve for x
    x = 333,791,705.77/20,657.89
  6. Step 6: Final answer
    x = 16,158.07

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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.