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Finding the Fourth Proportional to 18,322.70, 25,263.16 and 15,485.06

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Solution

The fourth proportional to 18,322.70, 25,263.16 and 15,485.06 is: 21,350.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,322.70 : 25,263.16 = 15,485.06 : x
  2. Step 2: Convert to fraction form
    18,322.70/25,263.16 = 15,485.06/x
  3. Step 3: Cross multiply
    18,322.70x = 25,263.16 × 15,485.06
  4. Step 4: Simplify right side
    18,322.70x = 391,201,572.83
  5. Step 5: Solve for x
    x = 391,201,572.83/18,322.70
  6. Step 6: Final answer
    x = 21,350.66

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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.