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Finding the Fourth Proportional to 28,364.70, 42,547.05 and 21,803.70

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Solution

The fourth proportional to 28,364.70, 42,547.05 and 21,803.70 is: 32,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,364.70 : 42,547.05 = 21,803.70 : x
  2. Step 2: Convert to fraction form
    28,364.70/42,547.05 = 21,803.70/x
  3. Step 3: Cross multiply
    28,364.70x = 42,547.05 × 21,803.70
  4. Step 4: Simplify right side
    28,364.70x = 927,683,114.09
  5. Step 5: Solve for x
    x = 927,683,114.09/28,364.70
  6. Step 6: Final answer
    x = 32,705.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.