Home / 15,271.68-21,072.96-8,981.76

Finding the Fourth Proportional to 15,271.68, 21,072.96 and 8,981.76

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Solution

The fourth proportional to 15,271.68, 21,072.96 and 8,981.76 is: 12,393.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,271.68 : 21,072.96 = 8,981.76 : x
  2. Step 2: Convert to fraction form
    15,271.68/21,072.96 = 8,981.76/x
  3. Step 3: Cross multiply
    15,271.68x = 21,072.96 × 8,981.76
  4. Step 4: Simplify right side
    15,271.68x = 189,272,269.21
  5. Step 5: Solve for x
    x = 189,272,269.21/15,271.68
  6. Step 6: Final answer
    x = 12,393.68

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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.