Home / 15,291.56-21,094.58-9,989.48

Finding the Fourth Proportional to 15,291.56, 21,094.58 and 9,989.48

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Solution

The fourth proportional to 15,291.56, 21,094.58 and 9,989.48 is: 13,780.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,291.56 : 21,094.58 = 9,989.48 : x
  2. Step 2: Convert to fraction form
    15,291.56/21,094.58 = 9,989.48/x
  3. Step 3: Cross multiply
    15,291.56x = 21,094.58 × 9,989.48
  4. Step 4: Simplify right side
    15,291.56x = 210,723,885.02
  5. Step 5: Solve for x
    x = 210,723,885.02/15,291.56
  6. Step 6: Final answer
    x = 13,780.40

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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.