Home / 13,977.12-19,289.04-7,689.76

Finding the Fourth Proportional to 13,977.12, 19,289.04 and 7,689.76

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Solution

The fourth proportional to 13,977.12, 19,289.04 and 7,689.76 is: 10,612.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.12 : 19,289.04 = 7,689.76 : x
  2. Step 2: Convert to fraction form
    13,977.12/19,289.04 = 7,689.76/x
  3. Step 3: Cross multiply
    13,977.12x = 19,289.04 × 7,689.76
  4. Step 4: Simplify right side
    13,977.12x = 148,328,088.23
  5. Step 5: Solve for x
    x = 148,328,088.23/13,977.12
  6. Step 6: Final answer
    x = 10,612.21

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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.