Home / 13,980.89-20,978.63-5,667.05

Finding the Fourth Proportional to 13,980.89, 20,978.63 and 5,667.05

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Solution

The fourth proportional to 13,980.89, 20,978.63 and 5,667.05 is: 8,503.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.89 : 20,978.63 = 5,667.05 : x
  2. Step 2: Convert to fraction form
    13,980.89/20,978.63 = 5,667.05/x
  3. Step 3: Cross multiply
    13,980.89x = 20,978.63 × 5,667.05
  4. Step 4: Simplify right side
    13,980.89x = 118,886,916.81
  5. Step 5: Solve for x
    x = 118,886,916.81/13,980.89
  6. Step 6: Final answer
    x = 8,503.53

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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.