Home / 13,117.30-19,724.55-10,978.90

Finding the Fourth Proportional to 13,117.30, 19,724.55 and 10,978.90

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Solution

The fourth proportional to 13,117.30, 19,724.55 and 10,978.90 is: 16,509.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,117.30 : 19,724.55 = 10,978.90 : x
  2. Step 2: Convert to fraction form
    13,117.30/19,724.55 = 10,978.90/x
  3. Step 3: Cross multiply
    13,117.30x = 19,724.55 × 10,978.90
  4. Step 4: Simplify right side
    13,117.30x = 216,553,862.00
  5. Step 5: Solve for x
    x = 216,553,862.00/13,117.30
  6. Step 6: Final answer
    x = 16,509.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.