Home / 15,521.66-21,417.06-10,142.68

Finding the Fourth Proportional to 15,521.66, 21,417.06 and 10,142.68

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Solution

The fourth proportional to 15,521.66, 21,417.06 and 10,142.68 is: 13,995.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,521.66 : 21,417.06 = 10,142.68 : x
  2. Step 2: Convert to fraction form
    15,521.66/21,417.06 = 10,142.68/x
  3. Step 3: Cross multiply
    15,521.66x = 21,417.06 × 10,142.68
  4. Step 4: Simplify right side
    15,521.66x = 217,226,386.12
  5. Step 5: Solve for x
    x = 217,226,386.12/15,521.66
  6. Step 6: Final answer
    x = 13,995.05

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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.