Home / 15,885.60-21,872.28-13,490.58

Finding the Fourth Proportional to 15,885.60, 21,872.28 and 13,490.58

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Solution

The fourth proportional to 15,885.60, 21,872.28 and 13,490.58 is: 18,574.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,885.60 : 21,872.28 = 13,490.58 : x
  2. Step 2: Convert to fraction form
    15,885.60/21,872.28 = 13,490.58/x
  3. Step 3: Cross multiply
    15,885.60x = 21,872.28 × 13,490.58
  4. Step 4: Simplify right side
    15,885.60x = 295,069,743.12
  5. Step 5: Solve for x
    x = 295,069,743.12/15,885.60
  6. Step 6: Final answer
    x = 18,574.67

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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.