Home / 27,987.86-38,623.74-15,412.58

Finding the Fourth Proportional to 27,987.86, 38,623.74 and 15,412.58

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Solution

The fourth proportional to 27,987.86, 38,623.74 and 15,412.58 is: 21,269.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.86 : 38,623.74 = 15,412.58 : x
  2. Step 2: Convert to fraction form
    27,987.86/38,623.74 = 15,412.58/x
  3. Step 3: Cross multiply
    27,987.86x = 38,623.74 × 15,412.58
  4. Step 4: Simplify right side
    27,987.86x = 595,291,482.65
  5. Step 5: Solve for x
    x = 595,291,482.65/27,987.86
  6. Step 6: Final answer
    x = 21,269.63

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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.