Home / 15,420.95-21,280.48-8,614.79

Finding the Fourth Proportional to 15,420.95, 21,280.48 and 8,614.79

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Solution

The fourth proportional to 15,420.95, 21,280.48 and 8,614.79 is: 11,888.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.95 : 21,280.48 = 8,614.79 : x
  2. Step 2: Convert to fraction form
    15,420.95/21,280.48 = 8,614.79/x
  3. Step 3: Cross multiply
    15,420.95x = 21,280.48 × 8,614.79
  4. Step 4: Simplify right side
    15,420.95x = 183,326,738.36
  5. Step 5: Solve for x
    x = 183,326,738.36/15,420.95
  6. Step 6: Final answer
    x = 11,888.16

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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.