Home / 11,219.40-15,482.40-6,440.16

Finding the Fourth Proportional to 11,219.40, 15,482.40 and 6,440.16

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Solution

The fourth proportional to 11,219.40, 15,482.40 and 6,440.16 is: 8,887.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,219.40 : 15,482.40 = 6,440.16 : x
  2. Step 2: Convert to fraction form
    11,219.40/15,482.40 = 6,440.16/x
  3. Step 3: Cross multiply
    11,219.40x = 15,482.40 × 6,440.16
  4. Step 4: Simplify right side
    11,219.40x = 99,709,133.18
  5. Step 5: Solve for x
    x = 99,709,133.18/11,219.40
  6. Step 6: Final answer
    x = 8,887.21

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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.