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Finding the Fourth Proportional to 25,699.91, 35,477.40 and 15,090.20

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Solution

The fourth proportional to 25,699.91, 35,477.40 and 15,090.20 is: 20,831.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,699.91 : 35,477.40 = 15,090.20 : x
  2. Step 2: Convert to fraction form
    25,699.91/35,477.40 = 15,090.20/x
  3. Step 3: Cross multiply
    25,699.91x = 35,477.40 × 15,090.20
  4. Step 4: Simplify right side
    25,699.91x = 535,360,884.09
  5. Step 5: Solve for x
    x = 535,360,884.09/25,699.91
  6. Step 6: Final answer
    x = 20,831.24

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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.