Home / 21,138.48-31,683.76-16,423.48

Finding the Fourth Proportional to 21,138.48, 31,683.76 and 16,423.48

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Solution

The fourth proportional to 21,138.48, 31,683.76 and 16,423.48 is: 24,616.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.48 : 31,683.76 = 16,423.48 : x
  2. Step 2: Convert to fraction form
    21,138.48/31,683.76 = 16,423.48/x
  3. Step 3: Cross multiply
    21,138.48x = 31,683.76 × 16,423.48
  4. Step 4: Simplify right side
    21,138.48x = 520,357,598.68
  5. Step 5: Solve for x
    x = 520,357,598.68/21,138.48
  6. Step 6: Final answer
    x = 24,616.60

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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.