Home / 15,582.80-21,506.10-8,870.60

Finding the Fourth Proportional to 15,582.80, 21,506.10 and 8,870.60

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Solution

The fourth proportional to 15,582.80, 21,506.10 and 8,870.60 is: 12,242.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,582.80 : 21,506.10 = 8,870.60 : x
  2. Step 2: Convert to fraction form
    15,582.80/21,506.10 = 8,870.60/x
  3. Step 3: Cross multiply
    15,582.80x = 21,506.10 × 8,870.60
  4. Step 4: Simplify right side
    15,582.80x = 190,772,010.66
  5. Step 5: Solve for x
    x = 190,772,010.66/15,582.80
  6. Step 6: Final answer
    x = 12,242.47

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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.