Home / 21,390.98-29,518.71-11,830.24

Finding the Fourth Proportional to 21,390.98, 29,518.71 and 11,830.24

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Solution

The fourth proportional to 21,390.98, 29,518.71 and 11,830.24 is: 16,325.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.98 : 29,518.71 = 11,830.24 : x
  2. Step 2: Convert to fraction form
    21,390.98/29,518.71 = 11,830.24/x
  3. Step 3: Cross multiply
    21,390.98x = 29,518.71 × 11,830.24
  4. Step 4: Simplify right side
    21,390.98x = 349,213,276.20
  5. Step 5: Solve for x
    x = 349,213,276.20/21,390.98
  6. Step 6: Final answer
    x = 16,325.26

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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.