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Finding the Fourth Proportional to 18,370.51, 25,351.72 and 9,987.01

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Solution

The fourth proportional to 18,370.51, 25,351.72 and 9,987.01 is: 13,782.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,370.51 : 25,351.72 = 9,987.01 : x
  2. Step 2: Convert to fraction form
    18,370.51/25,351.72 = 9,987.01/x
  3. Step 3: Cross multiply
    18,370.51x = 25,351.72 × 9,987.01
  4. Step 4: Simplify right side
    18,370.51x = 253,187,792.81
  5. Step 5: Solve for x
    x = 253,187,792.81/18,370.51
  6. Step 6: Final answer
    x = 13,782.30

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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.