Home / 19,709.12-27,210.84-12,543.05

Finding the Fourth Proportional to 19,709.12, 27,210.84 and 12,543.05

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Solution

The fourth proportional to 19,709.12, 27,210.84 and 12,543.05 is: 17,317.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,709.12 : 27,210.84 = 12,543.05 : x
  2. Step 2: Convert to fraction form
    19,709.12/27,210.84 = 12,543.05/x
  3. Step 3: Cross multiply
    19,709.12x = 27,210.84 × 12,543.05
  4. Step 4: Simplify right side
    19,709.12x = 341,306,947.65
  5. Step 5: Solve for x
    x = 341,306,947.65/19,709.12
  6. Step 6: Final answer
    x = 17,317.21

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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.