Home / 15,389.19-21,237.15-9,019.55

Finding the Fourth Proportional to 15,389.19, 21,237.15 and 9,019.55

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Solution

The fourth proportional to 15,389.19, 21,237.15 and 9,019.55 is: 12,447.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.19 : 21,237.15 = 9,019.55 : x
  2. Step 2: Convert to fraction form
    15,389.19/21,237.15 = 9,019.55/x
  3. Step 3: Cross multiply
    15,389.19x = 21,237.15 × 9,019.55
  4. Step 4: Simplify right side
    15,389.19x = 191,549,623.20
  5. Step 5: Solve for x
    x = 191,549,623.20/15,389.19
  6. Step 6: Final answer
    x = 12,447.02

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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.