Home / 13,440.64-18,551.04-7,779.28

Finding the Fourth Proportional to 13,440.64, 18,551.04 and 7,779.28

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Solution

The fourth proportional to 13,440.64, 18,551.04 and 7,779.28 is: 10,737.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,440.64 : 18,551.04 = 7,779.28 : x
  2. Step 2: Convert to fraction form
    13,440.64/18,551.04 = 7,779.28/x
  3. Step 3: Cross multiply
    13,440.64x = 18,551.04 × 7,779.28
  4. Step 4: Simplify right side
    13,440.64x = 144,313,734.45
  5. Step 5: Solve for x
    x = 144,313,734.45/13,440.64
  6. Step 6: Final answer
    x = 10,737.12

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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.