Home / 20,968.10-28,931.23-15,305.94

Finding the Fourth Proportional to 20,968.10, 28,931.23 and 15,305.94

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Solution

The fourth proportional to 20,968.10, 28,931.23 and 15,305.94 is: 21,118.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.10 : 28,931.23 = 15,305.94 : x
  2. Step 2: Convert to fraction form
    20,968.10/28,931.23 = 15,305.94/x
  3. Step 3: Cross multiply
    20,968.10x = 28,931.23 × 15,305.94
  4. Step 4: Simplify right side
    20,968.10x = 442,819,670.51
  5. Step 5: Solve for x
    x = 442,819,670.51/20,968.10
  6. Step 6: Final answer
    x = 21,118.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.