Home / 15,513.80-21,389.06-11,271.02

Finding the Fourth Proportional to 15,513.80, 21,389.06 and 11,271.02

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Solution

The fourth proportional to 15,513.80, 21,389.06 and 11,271.02 is: 15,539.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.80 : 21,389.06 = 11,271.02 : x
  2. Step 2: Convert to fraction form
    15,513.80/21,389.06 = 11,271.02/x
  3. Step 3: Cross multiply
    15,513.80x = 21,389.06 × 11,271.02
  4. Step 4: Simplify right side
    15,513.80x = 241,076,444.27
  5. Step 5: Solve for x
    x = 241,076,444.27/15,513.80
  6. Step 6: Final answer
    x = 15,539.49

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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.