Home / 15,219.06-21,008.16-13,622.90

Finding the Fourth Proportional to 15,219.06, 21,008.16 and 13,622.90

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Solution

The fourth proportional to 15,219.06, 21,008.16 and 13,622.90 is: 18,804.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,219.06 : 21,008.16 = 13,622.90 : x
  2. Step 2: Convert to fraction form
    15,219.06/21,008.16 = 13,622.90/x
  3. Step 3: Cross multiply
    15,219.06x = 21,008.16 × 13,622.90
  4. Step 4: Simplify right side
    15,219.06x = 286,191,957.82
  5. Step 5: Solve for x
    x = 286,191,957.82/15,219.06
  6. Step 6: Final answer
    x = 18,804.84

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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.