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Finding the Fourth Proportional to 18,898.48, 28,347.72 and 13,417.99

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Solution

The fourth proportional to 18,898.48, 28,347.72 and 13,417.99 is: 20,126.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.48 : 28,347.72 = 13,417.99 : x
  2. Step 2: Convert to fraction form
    18,898.48/28,347.72 = 13,417.99/x
  3. Step 3: Cross multiply
    18,898.48x = 28,347.72 × 13,417.99
  4. Step 4: Simplify right side
    18,898.48x = 380,369,423.48
  5. Step 5: Solve for x
    x = 380,369,423.48/18,898.48
  6. Step 6: Final answer
    x = 20,126.99

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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.