Home / 20,979.02-28,951.06-11,547.50

Finding the Fourth Proportional to 20,979.02, 28,951.06 and 11,547.50

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Solution

The fourth proportional to 20,979.02, 28,951.06 and 11,547.50 is: 15,935.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.02 : 28,951.06 = 11,547.50 : x
  2. Step 2: Convert to fraction form
    20,979.02/28,951.06 = 11,547.50/x
  3. Step 3: Cross multiply
    20,979.02x = 28,951.06 × 11,547.50
  4. Step 4: Simplify right side
    20,979.02x = 334,312,365.35
  5. Step 5: Solve for x
    x = 334,312,365.35/20,979.02
  6. Step 6: Final answer
    x = 15,935.56

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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.