Home / 15,408.48-21,256.56-9,740.64

Finding the Fourth Proportional to 15,408.48, 21,256.56 and 9,740.64

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Solution

The fourth proportional to 15,408.48, 21,256.56 and 9,740.64 is: 13,437.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,408.48 : 21,256.56 = 9,740.64 : x
  2. Step 2: Convert to fraction form
    15,408.48/21,256.56 = 9,740.64/x
  3. Step 3: Cross multiply
    15,408.48x = 21,256.56 × 9,740.64
  4. Step 4: Simplify right side
    15,408.48x = 207,052,498.60
  5. Step 5: Solve for x
    x = 207,052,498.60/15,408.48
  6. Step 6: Final answer
    x = 13,437.57

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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.