Finding the Fourth Proportional to 28,485,487.78, 39,310,011.70 and 15,432,746.31
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Solution
The fourth proportional to 28,485,487.78, 39,310,011.70 and 15,432,746.31 is: 21,297,210.80
Step by Step Solution
- Step 1: Write the proportion equation
28,485,487.78 : 39,310,011.70 = 15,432,746.31 : x - Step 2: Convert to fraction form
28,485,487.78/39,310,011.70 = 15,432,746.31/x - Step 3: Cross multiply
28,485,487.78x = 39,310,011.70 × 15,432,746.31 - Step 4: Simplify right side
28,485,487.78x = 606,661,437,970,650 - Step 5: Solve for x
x = 606,661,437,970,650/28,485,487.78 - Step 6: Final answer
x = 21,297,210.80
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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.