Home / 14,207.61-21,172.89-13,780.05

Finding the Fourth Proportional to 14,207.61, 21,172.89 and 13,780.05

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Solution

The fourth proportional to 14,207.61, 21,172.89 and 13,780.05 is: 20,535.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,207.61 : 21,172.89 = 13,780.05 : x
  2. Step 2: Convert to fraction form
    14,207.61/21,172.89 = 13,780.05/x
  3. Step 3: Cross multiply
    14,207.61x = 21,172.89 × 13,780.05
  4. Step 4: Simplify right side
    14,207.61x = 291,763,482.84
  5. Step 5: Solve for x
    x = 291,763,482.84/14,207.61
  6. Step 6: Final answer
    x = 20,535.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.