Home / 13,128.50-19,681.71-5,342.90

Finding the Fourth Proportional to 13,128.50, 19,681.71 and 5,342.90

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Solution

The fourth proportional to 13,128.50, 19,681.71 and 5,342.90 is: 8,009.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.50 : 19,681.71 = 5,342.90 : x
  2. Step 2: Convert to fraction form
    13,128.50/19,681.71 = 5,342.90/x
  3. Step 3: Cross multiply
    13,128.50x = 19,681.71 × 5,342.90
  4. Step 4: Simplify right side
    13,128.50x = 105,157,408.36
  5. Step 5: Solve for x
    x = 105,157,408.36/13,128.50
  6. Step 6: Final answer
    x = 8,009.86

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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.