Home / 38,688,138-53,389,629.36-21,284,108.64

Finding the Fourth Proportional to 38,688,138, 53,389,629.36 and 21,284,108.64

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Solution

The fourth proportional to 38,688,138, 53,389,629.36 and 21,284,108.64 is: 29,372,069.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,688,138 : 53,389,629.36 = 21,284,108.64 : x
  2. Step 2: Convert to fraction form
    38,688,138/53,389,629.36 = 21,284,108.64/x
  3. Step 3: Cross multiply
    38,688,138x = 53,389,629.36 × 21,284,108.64
  4. Step 4: Simplify right side
    38,688,138x = 1,136,350,671,547,573.75
  5. Step 5: Solve for x
    x = 1,136,350,671,547,573.75/38,688,138
  6. Step 6: Final answer
    x = 29,372,069.33

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Double scale
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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.