Home / 15,312.15-21,115.21-14,419.21

Finding the Fourth Proportional to 15,312.15, 21,115.21 and 14,419.21

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Solution

The fourth proportional to 15,312.15, 21,115.21 and 14,419.21 is: 19,883.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,312.15 : 21,115.21 = 14,419.21 : x
  2. Step 2: Convert to fraction form
    15,312.15/21,115.21 = 14,419.21/x
  3. Step 3: Cross multiply
    15,312.15x = 21,115.21 × 14,419.21
  4. Step 4: Simplify right side
    15,312.15x = 304,464,647.18
  5. Step 5: Solve for x
    x = 304,464,647.18/15,312.15
  6. Step 6: Final answer
    x = 19,883.86

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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.