Home / 15,421.50-21,272.10-11,384.21

Finding the Fourth Proportional to 15,421.50, 21,272.10 and 11,384.21

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Solution

The fourth proportional to 15,421.50, 21,272.10 and 11,384.21 is: 15,703.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.50 : 21,272.10 = 11,384.21 : x
  2. Step 2: Convert to fraction form
    15,421.50/21,272.10 = 11,384.21/x
  3. Step 3: Cross multiply
    15,421.50x = 21,272.10 × 11,384.21
  4. Step 4: Simplify right side
    15,421.50x = 242,165,947.18
  5. Step 5: Solve for x
    x = 242,165,947.18/15,421.50
  6. Step 6: Final answer
    x = 15,703.14

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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.