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Finding the Fourth Proportional to 15,510.99, 21,404.55 and 8,437.42

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Solution

The fourth proportional to 15,510.99, 21,404.55 and 8,437.42 is: 11,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,510.99 : 21,404.55 = 8,437.42 : x
  2. Step 2: Convert to fraction form
    15,510.99/21,404.55 = 8,437.42/x
  3. Step 3: Cross multiply
    15,510.99x = 21,404.55 × 8,437.42
  4. Step 4: Simplify right side
    15,510.99x = 180,599,116.26
  5. Step 5: Solve for x
    x = 180,599,116.26/15,510.99
  6. Step 6: Final answer
    x = 11,643.30

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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.