Finding the Fourth Proportional to 28,483,712.20, 39,307,305.57 and 15,430,877.74
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Solution
The fourth proportional to 28,483,712.20, 39,307,305.57 and 15,430,877.74 is: 21,294,493.58
Step by Step Solution
- Step 1: Write the proportion equation
28,483,712.20 : 39,307,305.57 = 15,430,877.74 : x - Step 2: Convert to fraction form
28,483,712.20/39,307,305.57 = 15,430,877.74/x - Step 3: Cross multiply
28,483,712.20x = 39,307,305.57 × 15,430,877.74 - Step 4: Simplify right side
28,483,712.20x = 606,546,226,539,491 - Step 5: Solve for x
x = 606,546,226,539,491/28,483,712.20 - Step 6: Final answer
x = 21,294,493.58
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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.