Home / 8,970.12-12,378.76-4,991.49

Finding the Fourth Proportional to 8,970.12, 12,378.76 and 4,991.49

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Solution

The fourth proportional to 8,970.12, 12,378.76 and 4,991.49 is: 6,888.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,970.12 : 12,378.76 = 4,991.49 : x
  2. Step 2: Convert to fraction form
    8,970.12/12,378.76 = 4,991.49/x
  3. Step 3: Cross multiply
    8,970.12x = 12,378.76 × 4,991.49
  4. Step 4: Simplify right side
    8,970.12x = 61,788,413.11
  5. Step 5: Solve for x
    x = 61,788,413.11/8,970.12
  6. Step 6: Final answer
    x = 6,888.25

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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.