Home / 15,420.06-21,281.40-9,132.84

Finding the Fourth Proportional to 15,420.06, 21,281.40 and 9,132.84

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Solution

The fourth proportional to 15,420.06, 21,281.40 and 9,132.84 is: 12,604.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.06 : 21,281.40 = 9,132.84 : x
  2. Step 2: Convert to fraction form
    15,420.06/21,281.40 = 9,132.84/x
  3. Step 3: Cross multiply
    15,420.06x = 21,281.40 × 9,132.84
  4. Step 4: Simplify right side
    15,420.06x = 194,359,621.18
  5. Step 5: Solve for x
    x = 194,359,621.18/15,420.06
  6. Step 6: Final answer
    x = 12,604.34

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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.