Home / 20,989.09-31,483.59-14,395.28

Finding the Fourth Proportional to 20,989.09, 31,483.59 and 14,395.28

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Solution

The fourth proportional to 20,989.09, 31,483.59 and 14,395.28 is: 21,592.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.09 : 31,483.59 = 14,395.28 : x
  2. Step 2: Convert to fraction form
    20,989.09/31,483.59 = 14,395.28/x
  3. Step 3: Cross multiply
    20,989.09x = 31,483.59 × 14,395.28
  4. Step 4: Simplify right side
    20,989.09x = 453,215,093.46
  5. Step 5: Solve for x
    x = 453,215,093.46/20,989.09
  6. Step 6: Final answer
    x = 21,592.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.