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Finding the Fourth Proportional to 21,018,998.70, 31,528,498.05 and 21,018,998.70

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Solution

The fourth proportional to 21,018,998.70, 31,528,498.05 and 21,018,998.70 is: 31,528,498.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018,998.70 : 31,528,498.05 = 21,018,998.70 : x
  2. Step 2: Convert to fraction form
    21,018,998.70/31,528,498.05 = 21,018,998.70/x
  3. Step 3: Cross multiply
    21,018,998.70x = 31,528,498.05 × 21,018,998.70
  4. Step 4: Simplify right side
    21,018,998.70x = 662,697,459,525,902.50
  5. Step 5: Solve for x
    x = 662,697,459,525,902.50/21,018,998.70
  6. Step 6: Final answer
    x = 31,528,498.05

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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.