Home / 13,619.40-20,429.10-8,953.80

Finding the Fourth Proportional to 13,619.40, 20,429.10 and 8,953.80

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Solution

The fourth proportional to 13,619.40, 20,429.10 and 8,953.80 is: 13,430.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,619.40 : 20,429.10 = 8,953.80 : x
  2. Step 2: Convert to fraction form
    13,619.40/20,429.10 = 8,953.80/x
  3. Step 3: Cross multiply
    13,619.40x = 20,429.10 × 8,953.80
  4. Step 4: Simplify right side
    13,619.40x = 182,918,075.58
  5. Step 5: Solve for x
    x = 182,918,075.58/13,619.40
  6. Step 6: Final answer
    x = 13,430.70

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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.