Home / 15,389.01-21,244.55-11,978.51

Finding the Fourth Proportional to 15,389.01, 21,244.55 and 11,978.51

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Solution

The fourth proportional to 15,389.01, 21,244.55 and 11,978.51 is: 16,536.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.01 : 21,244.55 = 11,978.51 : x
  2. Step 2: Convert to fraction form
    15,389.01/21,244.55 = 11,978.51/x
  3. Step 3: Cross multiply
    15,389.01x = 21,244.55 × 11,978.51
  4. Step 4: Simplify right side
    15,389.01x = 254,477,888.51
  5. Step 5: Solve for x
    x = 254,477,888.51/15,389.01
  6. Step 6: Final answer
    x = 16,536.34

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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.