Home / 12,938.60-19,407.90-5,543.30

Finding the Fourth Proportional to 12,938.60, 19,407.90 and 5,543.30

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Solution

The fourth proportional to 12,938.60, 19,407.90 and 5,543.30 is: 8,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.60 : 19,407.90 = 5,543.30 : x
  2. Step 2: Convert to fraction form
    12,938.60/19,407.90 = 5,543.30/x
  3. Step 3: Cross multiply
    12,938.60x = 19,407.90 × 5,543.30
  4. Step 4: Simplify right side
    12,938.60x = 107,583,812.07
  5. Step 5: Solve for x
    x = 107,583,812.07/12,938.60
  6. Step 6: Final answer
    x = 8,314.95

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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.