Home / 19,220.48-28,840.80-9,987.20

Finding the Fourth Proportional to 19,220.48, 28,840.80 and 9,987.20

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Solution

The fourth proportional to 19,220.48, 28,840.80 and 9,987.20 is: 14,986.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,220.48 : 28,840.80 = 9,987.20 : x
  2. Step 2: Convert to fraction form
    19,220.48/28,840.80 = 9,987.20/x
  3. Step 3: Cross multiply
    19,220.48x = 28,840.80 × 9,987.20
  4. Step 4: Simplify right side
    19,220.48x = 288,038,837.76
  5. Step 5: Solve for x
    x = 288,038,837.76/19,220.48
  6. Step 6: Final answer
    x = 14,986.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.