Home / 15,420.90-21,258.57-10,106.49

Finding the Fourth Proportional to 15,420.90, 21,258.57 and 10,106.49

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Solution

The fourth proportional to 15,420.90, 21,258.57 and 10,106.49 is: 13,932.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.90 : 21,258.57 = 10,106.49 : x
  2. Step 2: Convert to fraction form
    15,420.90/21,258.57 = 10,106.49/x
  3. Step 3: Cross multiply
    15,420.90x = 21,258.57 × 10,106.49
  4. Step 4: Simplify right side
    15,420.90x = 214,849,525.12
  5. Step 5: Solve for x
    x = 214,849,525.12/15,420.90
  6. Step 6: Final answer
    x = 13,932.36

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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.