Home / 21,828.02-30,114.72-12,391.11

Finding the Fourth Proportional to 21,828.02, 30,114.72 and 12,391.11

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Solution

The fourth proportional to 21,828.02, 30,114.72 and 12,391.11 is: 17,095.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,828.02 : 30,114.72 = 12,391.11 : x
  2. Step 2: Convert to fraction form
    21,828.02/30,114.72 = 12,391.11/x
  3. Step 3: Cross multiply
    21,828.02x = 30,114.72 × 12,391.11
  4. Step 4: Simplify right side
    21,828.02x = 373,154,808.14
  5. Step 5: Solve for x
    x = 373,154,808.14/21,828.02
  6. Step 6: Final answer
    x = 17,095.22

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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.