Home / 13,977.06-19,287.90-7,689.40

Finding the Fourth Proportional to 13,977.06, 19,287.90 and 7,689.40

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Solution

The fourth proportional to 13,977.06, 19,287.90 and 7,689.40 is: 10,611.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.06 : 19,287.90 = 7,689.40 : x
  2. Step 2: Convert to fraction form
    13,977.06/19,287.90 = 7,689.40/x
  3. Step 3: Cross multiply
    13,977.06x = 19,287.90 × 7,689.40
  4. Step 4: Simplify right side
    13,977.06x = 148,312,378.26
  5. Step 5: Solve for x
    x = 148,312,378.26/13,977.06
  6. Step 6: Final answer
    x = 10,611.13

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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.