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Finding the Fourth Proportional to 18,720, 25,837.08 and 10,762.32

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Solution

The fourth proportional to 18,720, 25,837.08 and 10,762.32 is: 14,854.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720 : 25,837.08 = 10,762.32 : x
  2. Step 2: Convert to fraction form
    18,720/25,837.08 = 10,762.32/x
  3. Step 3: Cross multiply
    18,720x = 25,837.08 × 10,762.32
  4. Step 4: Simplify right side
    18,720x = 278,066,922.83
  5. Step 5: Solve for x
    x = 278,066,922.83/18,720
  6. Step 6: Final answer
    x = 14,854.00

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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.