Home / 20,925.95-28,873.87-12,970.13

Finding the Fourth Proportional to 20,925.95, 28,873.87 and 12,970.13

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Solution

The fourth proportional to 20,925.95, 28,873.87 and 12,970.13 is: 17,896.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.95 : 28,873.87 = 12,970.13 : x
  2. Step 2: Convert to fraction form
    20,925.95/28,873.87 = 12,970.13/x
  3. Step 3: Cross multiply
    20,925.95x = 28,873.87 × 12,970.13
  4. Step 4: Simplify right side
    20,925.95x = 374,497,670.71
  5. Step 5: Solve for x
    x = 374,497,670.71/20,925.95
  6. Step 6: Final answer
    x = 17,896.33

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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.