Home / 21,036.36-31,543.74-6,991.32

Finding the Fourth Proportional to 21,036.36, 31,543.74 and 6,991.32

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Solution

The fourth proportional to 21,036.36, 31,543.74 and 6,991.32 is: 10,483.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.36 : 31,543.74 = 6,991.32 : x
  2. Step 2: Convert to fraction form
    21,036.36/31,543.74 = 6,991.32/x
  3. Step 3: Cross multiply
    21,036.36x = 31,543.74 × 6,991.32
  4. Step 4: Simplify right side
    21,036.36x = 220,532,380.34
  5. Step 5: Solve for x
    x = 220,532,380.34/21,036.36
  6. Step 6: Final answer
    x = 10,483.39

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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.