Home / 15,289.02-21,095.64-9,991.62

Finding the Fourth Proportional to 15,289.02, 21,095.64 and 9,991.62

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Solution

The fourth proportional to 15,289.02, 21,095.64 and 9,991.62 is: 13,786.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.02 : 21,095.64 = 9,991.62 : x
  2. Step 2: Convert to fraction form
    15,289.02/21,095.64 = 9,991.62/x
  3. Step 3: Cross multiply
    15,289.02x = 21,095.64 × 9,991.62
  4. Step 4: Simplify right side
    15,289.02x = 210,779,618.54
  5. Step 5: Solve for x
    x = 210,779,618.54/15,289.02
  6. Step 6: Final answer
    x = 13,786.34

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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.