Home / 21,511.53-29,688.02-12,437.28

Finding the Fourth Proportional to 21,511.53, 29,688.02 and 12,437.28

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Solution

The fourth proportional to 21,511.53, 29,688.02 and 12,437.28 is: 17,164.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,511.53 : 29,688.02 = 12,437.28 : x
  2. Step 2: Convert to fraction form
    21,511.53/29,688.02 = 12,437.28/x
  3. Step 3: Cross multiply
    21,511.53x = 29,688.02 × 12,437.28
  4. Step 4: Simplify right side
    21,511.53x = 369,238,217.39
  5. Step 5: Solve for x
    x = 369,238,217.39/21,511.53
  6. Step 6: Final answer
    x = 17,164.67

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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.