Home / 15,431.72-21,296.52-8,717.63

Finding the Fourth Proportional to 15,431.72, 21,296.52 and 8,717.63

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Solution

The fourth proportional to 15,431.72, 21,296.52 and 8,717.63 is: 12,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.72 : 21,296.52 = 8,717.63 : x
  2. Step 2: Convert to fraction form
    15,431.72/21,296.52 = 8,717.63/x
  3. Step 3: Cross multiply
    15,431.72x = 21,296.52 × 8,717.63
  4. Step 4: Simplify right side
    15,431.72x = 185,655,075.17
  5. Step 5: Solve for x
    x = 185,655,075.17/15,431.72
  6. Step 6: Final answer
    x = 12,030.75

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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.