Home / 15,465.29-21,359.49-10,420.68

Finding the Fourth Proportional to 15,465.29, 21,359.49 and 10,420.68

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Solution

The fourth proportional to 15,465.29, 21,359.49 and 10,420.68 is: 14,392.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,465.29 : 21,359.49 = 10,420.68 : x
  2. Step 2: Convert to fraction form
    15,465.29/21,359.49 = 10,420.68/x
  3. Step 3: Cross multiply
    15,465.29x = 21,359.49 × 10,420.68
  4. Step 4: Simplify right side
    15,465.29x = 222,580,410.25
  5. Step 5: Solve for x
    x = 222,580,410.25/15,465.29
  6. Step 6: Final answer
    x = 14,392.26

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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.