Home / 20,989.84-28,958.16-12,031.24

Finding the Fourth Proportional to 20,989.84, 28,958.16 and 12,031.24

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Solution

The fourth proportional to 20,989.84, 28,958.16 and 12,031.24 is: 16,598.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.84 : 28,958.16 = 12,031.24 : x
  2. Step 2: Convert to fraction form
    20,989.84/28,958.16 = 12,031.24/x
  3. Step 3: Cross multiply
    20,989.84x = 28,958.16 × 12,031.24
  4. Step 4: Simplify right side
    20,989.84x = 348,402,572.92
  5. Step 5: Solve for x
    x = 348,402,572.92/20,989.84
  6. Step 6: Final answer
    x = 16,598.63

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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.