Home / 20,897.95-31,346.79-5,315.44

Finding the Fourth Proportional to 20,897.95, 31,346.79 and 5,315.44

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Solution

The fourth proportional to 20,897.95, 31,346.79 and 5,315.44 is: 7,973.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.95 : 31,346.79 = 5,315.44 : x
  2. Step 2: Convert to fraction form
    20,897.95/31,346.79 = 5,315.44/x
  3. Step 3: Cross multiply
    20,897.95x = 31,346.79 × 5,315.44
  4. Step 4: Simplify right side
    20,897.95x = 166,621,981.44
  5. Step 5: Solve for x
    x = 166,621,981.44/20,897.95
  6. Step 6: Final answer
    x = 7,973.13

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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.