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Finding the Fourth Proportional to 18,700.48, 25,806.80 and 10,317.28

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Solution

The fourth proportional to 18,700.48, 25,806.80 and 10,317.28 is: 14,237.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,700.48 : 25,806.80 = 10,317.28 : x
  2. Step 2: Convert to fraction form
    18,700.48/25,806.80 = 10,317.28/x
  3. Step 3: Cross multiply
    18,700.48x = 25,806.80 × 10,317.28
  4. Step 4: Simplify right side
    18,700.48x = 266,255,981.50
  5. Step 5: Solve for x
    x = 266,255,981.50/18,700.48
  6. Step 6: Final answer
    x = 14,237.92

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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.