Home / 20,376.19-28,125.12-13,303.69

Finding the Fourth Proportional to 20,376.19, 28,125.12 and 13,303.69

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Solution

The fourth proportional to 20,376.19, 28,125.12 and 13,303.69 is: 18,363.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.19 : 28,125.12 = 13,303.69 : x
  2. Step 2: Convert to fraction form
    20,376.19/28,125.12 = 13,303.69/x
  3. Step 3: Cross multiply
    20,376.19x = 28,125.12 × 13,303.69
  4. Step 4: Simplify right side
    20,376.19x = 374,167,877.69
  5. Step 5: Solve for x
    x = 374,167,877.69/20,376.19
  6. Step 6: Final answer
    x = 18,363.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.