Home / 20,987.02-28,962.06-11,555.50

Finding the Fourth Proportional to 20,987.02, 28,962.06 and 11,555.50

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Solution

The fourth proportional to 20,987.02, 28,962.06 and 11,555.50 is: 15,946.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.02 : 28,962.06 = 11,555.50 : x
  2. Step 2: Convert to fraction form
    20,987.02/28,962.06 = 11,555.50/x
  3. Step 3: Cross multiply
    20,987.02x = 28,962.06 × 11,555.50
  4. Step 4: Simplify right side
    20,987.02x = 334,671,084.33
  5. Step 5: Solve for x
    x = 334,671,084.33/20,987.02
  6. Step 6: Final answer
    x = 15,946.57

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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.