Home / 21,085.17-29,099.36-11,655.55

Finding the Fourth Proportional to 21,085.17, 29,099.36 and 11,655.55

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Solution

The fourth proportional to 21,085.17, 29,099.36 and 11,655.55 is: 16,085.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.17 : 29,099.36 = 11,655.55 : x
  2. Step 2: Convert to fraction form
    21,085.17/29,099.36 = 11,655.55/x
  3. Step 3: Cross multiply
    21,085.17x = 29,099.36 × 11,655.55
  4. Step 4: Simplify right side
    21,085.17x = 339,169,045.45
  5. Step 5: Solve for x
    x = 339,169,045.45/21,085.17
  6. Step 6: Final answer
    x = 16,085.67

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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.