Home / 15,919.90-21,919.28-14,443.67

Finding the Fourth Proportional to 15,919.90, 21,919.28 and 14,443.67

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Solution

The fourth proportional to 15,919.90, 21,919.28 and 14,443.67 is: 19,886.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.90 : 21,919.28 = 14,443.67 : x
  2. Step 2: Convert to fraction form
    15,919.90/21,919.28 = 14,443.67/x
  3. Step 3: Cross multiply
    15,919.90x = 21,919.28 × 14,443.67
  4. Step 4: Simplify right side
    15,919.90x = 316,594,829.54
  5. Step 5: Solve for x
    x = 316,594,829.54/15,919.90
  6. Step 6: Final answer
    x = 19,886.74

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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.