Home / 13,995.28-19,312.68-8,405.20

Finding the Fourth Proportional to 13,995.28, 19,312.68 and 8,405.20

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Solution

The fourth proportional to 13,995.28, 19,312.68 and 8,405.20 is: 11,598.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,995.28 : 19,312.68 = 8,405.20 : x
  2. Step 2: Convert to fraction form
    13,995.28/19,312.68 = 8,405.20/x
  3. Step 3: Cross multiply
    13,995.28x = 19,312.68 × 8,405.20
  4. Step 4: Simplify right side
    13,995.28x = 162,326,937.94
  5. Step 5: Solve for x
    x = 162,326,937.94/13,995.28
  6. Step 6: Final answer
    x = 11,598.69

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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.