Home / 10,920.90-15,054.95-8,683.68

Finding the Fourth Proportional to 10,920.90, 15,054.95 and 8,683.68

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Solution

The fourth proportional to 10,920.90, 15,054.95 and 8,683.68 is: 11,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,920.90 : 15,054.95 = 8,683.68 : x
  2. Step 2: Convert to fraction form
    10,920.90/15,054.95 = 8,683.68/x
  3. Step 3: Cross multiply
    10,920.90x = 15,054.95 × 8,683.68
  4. Step 4: Simplify right side
    10,920.90x = 130,732,368.22
  5. Step 5: Solve for x
    x = 130,732,368.22/10,920.90
  6. Step 6: Final answer
    x = 11,970.84

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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.