Home / 15,864.24-21,888.60-9,898.80

Finding the Fourth Proportional to 15,864.24, 21,888.60 and 9,898.80

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Solution

The fourth proportional to 15,864.24, 21,888.60 and 9,898.80 is: 13,657.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.24 : 21,888.60 = 9,898.80 : x
  2. Step 2: Convert to fraction form
    15,864.24/21,888.60 = 9,898.80/x
  3. Step 3: Cross multiply
    15,864.24x = 21,888.60 × 9,898.80
  4. Step 4: Simplify right side
    15,864.24x = 216,670,873.68
  5. Step 5: Solve for x
    x = 216,670,873.68/15,864.24
  6. Step 6: Final answer
    x = 13,657.82

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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.