Home / 20,897.56-31,345.52-5,315.59

Finding the Fourth Proportional to 20,897.56, 31,345.52 and 5,315.59

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Solution

The fourth proportional to 20,897.56, 31,345.52 and 5,315.59 is: 7,973.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.56 : 31,345.52 = 5,315.59 : x
  2. Step 2: Convert to fraction form
    20,897.56/31,345.52 = 5,315.59/x
  3. Step 3: Cross multiply
    20,897.56x = 31,345.52 × 5,315.59
  4. Step 4: Simplify right side
    20,897.56x = 166,619,789.22
  5. Step 5: Solve for x
    x = 166,619,789.22/20,897.56
  6. Step 6: Final answer
    x = 7,973.17

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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.