Home / 13,385.50-20,075.40-8,448.55

Finding the Fourth Proportional to 13,385.50, 20,075.40 and 8,448.55

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Solution

The fourth proportional to 13,385.50, 20,075.40 and 8,448.55 is: 12,671.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.50 : 20,075.40 = 8,448.55 : x
  2. Step 2: Convert to fraction form
    13,385.50/20,075.40 = 8,448.55/x
  3. Step 3: Cross multiply
    13,385.50x = 20,075.40 × 8,448.55
  4. Step 4: Simplify right side
    13,385.50x = 169,607,970.48
  5. Step 5: Solve for x
    x = 169,607,970.48/13,385.50
  6. Step 6: Final answer
    x = 12,671.02

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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.