Home / 15,386.85-21,223.29-9,421.47

Finding the Fourth Proportional to 15,386.85, 21,223.29 and 9,421.47

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Solution

The fourth proportional to 15,386.85, 21,223.29 and 9,421.47 is: 12,995.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.85 : 21,223.29 = 9,421.47 : x
  2. Step 2: Convert to fraction form
    15,386.85/21,223.29 = 9,421.47/x
  3. Step 3: Cross multiply
    15,386.85x = 21,223.29 × 9,421.47
  4. Step 4: Simplify right side
    15,386.85x = 199,954,590.04
  5. Step 5: Solve for x
    x = 199,954,590.04/15,386.85
  6. Step 6: Final answer
    x = 12,995.16

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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.