Home / 20,990.51-31,485.72-14,396.70

Finding the Fourth Proportional to 20,990.51, 31,485.72 and 14,396.70

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Solution

The fourth proportional to 20,990.51, 31,485.72 and 14,396.70 is: 21,595.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.51 : 31,485.72 = 14,396.70 : x
  2. Step 2: Convert to fraction form
    20,990.51/31,485.72 = 14,396.70/x
  3. Step 3: Cross multiply
    20,990.51x = 31,485.72 × 14,396.70
  4. Step 4: Simplify right side
    20,990.51x = 453,290,465.12
  5. Step 5: Solve for x
    x = 453,290,465.12/20,990.51
  6. Step 6: Final answer
    x = 21,595.02

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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.