Home / 13,985.40-20,985.39-5,671.56

Finding the Fourth Proportional to 13,985.40, 20,985.39 and 5,671.56

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Solution

The fourth proportional to 13,985.40, 20,985.39 and 5,671.56 is: 8,510.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.40 : 20,985.39 = 5,671.56 : x
  2. Step 2: Convert to fraction form
    13,985.40/20,985.39 = 5,671.56/x
  3. Step 3: Cross multiply
    13,985.40x = 20,985.39 × 5,671.56
  4. Step 4: Simplify right side
    13,985.40x = 119,019,898.51
  5. Step 5: Solve for x
    x = 119,019,898.51/13,985.40
  6. Step 6: Final answer
    x = 8,510.30

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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.