Home / 38,688,072-53,389,538.28-21,284,042.64

Finding the Fourth Proportional to 38,688,072, 53,389,538.28 and 21,284,042.64

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Solution

The fourth proportional to 38,688,072, 53,389,538.28 and 21,284,042.64 is: 29,371,978.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,688,072 : 53,389,538.28 = 21,284,042.64 : x
  2. Step 2: Convert to fraction form
    38,688,072/53,389,538.28 = 21,284,042.64/x
  3. Step 3: Cross multiply
    38,688,072x = 53,389,538.28 × 21,284,042.64
  4. Step 4: Simplify right side
    38,688,072x = 1,136,345,209,281,432.25
  5. Step 5: Solve for x
    x = 1,136,345,209,281,432.25/38,688,072
  6. Step 6: Final answer
    x = 29,371,978.25

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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.