Home / 21,376.40-29,499-12,995.60

Finding the Fourth Proportional to 21,376.40, 29,499 and 12,995.60

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Solution

The fourth proportional to 21,376.40, 29,499 and 12,995.60 is: 17,933.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,376.40 : 29,499 = 12,995.60 : x
  2. Step 2: Convert to fraction form
    21,376.40/29,499 = 12,995.60/x
  3. Step 3: Cross multiply
    21,376.40x = 29,499 × 12,995.60
  4. Step 4: Simplify right side
    21,376.40x = 383,357,204.40
  5. Step 5: Solve for x
    x = 383,357,204.40/21,376.40
  6. Step 6: Final answer
    x = 17,933.67

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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.