Home / 15,421.34-21,281.27-8,707.25

Finding the Fourth Proportional to 15,421.34, 21,281.27 and 8,707.25

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Solution

The fourth proportional to 15,421.34, 21,281.27 and 8,707.25 is: 12,015.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,421.34 : 21,281.27 = 8,707.25 : x
  2. Step 2: Convert to fraction form
    15,421.34/21,281.27 = 8,707.25/x
  3. Step 3: Cross multiply
    15,421.34x = 21,281.27 × 8,707.25
  4. Step 4: Simplify right side
    15,421.34x = 185,301,413.18
  5. Step 5: Solve for x
    x = 185,301,413.18/15,421.34
  6. Step 6: Final answer
    x = 12,015.91

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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.