Home / 14,078.40-21,111.11-5,307.72

Finding the Fourth Proportional to 14,078.40, 21,111.11 and 5,307.72

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Solution

The fourth proportional to 14,078.40, 21,111.11 and 5,307.72 is: 7,959.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,078.40 : 21,111.11 = 5,307.72 : x
  2. Step 2: Convert to fraction form
    14,078.40/21,111.11 = 5,307.72/x
  3. Step 3: Cross multiply
    14,078.40x = 21,111.11 × 5,307.72
  4. Step 4: Simplify right side
    14,078.40x = 112,051,860.77
  5. Step 5: Solve for x
    x = 112,051,860.77/14,078.40
  6. Step 6: Final answer
    x = 7,959.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.