Home / 15,864.93-21,897-10,121.22

Finding the Fourth Proportional to 15,864.93, 21,897 and 10,121.22

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Solution

The fourth proportional to 15,864.93, 21,897 and 10,121.22 is: 13,969.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,864.93 : 21,897 = 10,121.22 : x
  2. Step 2: Convert to fraction form
    15,864.93/21,897 = 10,121.22/x
  3. Step 3: Cross multiply
    15,864.93x = 21,897 × 10,121.22
  4. Step 4: Simplify right side
    15,864.93x = 221,624,354.34
  5. Step 5: Solve for x
    x = 221,624,354.34/15,864.93
  6. Step 6: Final answer
    x = 13,969.45

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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.