Home / 21,390.89-29,518.58-11,830.16

Finding the Fourth Proportional to 21,390.89, 29,518.58 and 11,830.16

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Solution

The fourth proportional to 21,390.89, 29,518.58 and 11,830.16 is: 16,325.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.89 : 29,518.58 = 11,830.16 : x
  2. Step 2: Convert to fraction form
    21,390.89/29,518.58 = 11,830.16/x
  3. Step 3: Cross multiply
    21,390.89x = 29,518.58 × 11,830.16
  4. Step 4: Simplify right side
    21,390.89x = 349,209,317.63
  5. Step 5: Solve for x
    x = 349,209,317.63/21,390.89
  6. Step 6: Final answer
    x = 16,325.15

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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.