Home / 21,389.81-29,518.56-11,829.98

Finding the Fourth Proportional to 21,389.81, 29,518.56 and 11,829.98

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Solution

The fourth proportional to 21,389.81, 29,518.56 and 11,829.98 is: 16,325.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.81 : 29,518.56 = 11,829.98 : x
  2. Step 2: Convert to fraction form
    21,389.81/29,518.56 = 11,829.98/x
  3. Step 3: Cross multiply
    21,389.81x = 29,518.56 × 11,829.98
  4. Step 4: Simplify right side
    21,389.81x = 349,203,915.28
  5. Step 5: Solve for x
    x = 349,203,915.28/21,389.81
  6. Step 6: Final answer
    x = 16,325.72

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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.